diff --git a/Cargo.lock b/Cargo.lock
index f88f7eb..a5328e0 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -120,6 +120,15 @@ version = "2.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "630be753d4e58660abd17930c71b647fe46c27ea6b63cc59e1e3851406972e42"
 
+[[package]]
+name = "block-buffer"
+version = "0.10.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3078c7629b62d3f0439517fa394996acacc5cbc91c5a20d8c658e77abd503a71"
+dependencies = [
+ "generic-array",
+]
+
 [[package]]
 name = "bumpalo"
 version = "3.13.0"
@@ -191,6 +200,16 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "acbf1af155f9b9ef647e42cdc158db4b64a1b61f743629225fde6f3e0be2a7c7"
 
+[[package]]
+name = "conventional_commit_parser"
+version = "0.9.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "58660f9e1d5eeeeec9c33d1473ea8bba000c673a2189edaeedb4523ec7d6f7cb"
+dependencies = [
+ "pest",
+ "pest_derive",
+]
+
 [[package]]
 name = "core-foundation"
 version = "0.9.3"
@@ -207,12 +226,32 @@ version = "0.8.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e496a50fda8aacccc86d7529e2c1e0892dbd0f898a6b5645b5561b89c3210efa"
 
+[[package]]
+name = "cpufeatures"
+version = "0.2.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a17b76ff3a4162b0b27f354a0c87015ddad39d35f9c0c36607a3bdd175dde1f1"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "crypto-common"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1bfb12502f3fc46cca1bb51ac28df9d618d813cdc3d2f25b9fe775a34af26bb3"
+dependencies = [
+ "generic-array",
+ "typenum",
+]
+
 [[package]]
 name = "cuddle-please"
 version = "0.1.0"
 dependencies = [
  "anyhow",
  "clap",
+ "conventional_commit_parser",
  "dotenv",
  "reqwest",
  "semver",
@@ -225,6 +264,16 @@ dependencies = [
  "url",
 ]
 
+[[package]]
+name = "digest"
+version = "0.10.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9ed9a281f7bc9b7576e61468ba615a66a5c8cfdff42420a70aa82701a3b1e292"
+dependencies = [
+ "block-buffer",
+ "crypto-common",
+]
+
 [[package]]
 name = "dotenv"
 version = "0.15.0"
@@ -351,6 +400,16 @@ dependencies = [
  "slab",
 ]
 
+[[package]]
+name = "generic-array"
+version = "0.14.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "85649ca51fd72272d7821adaf274ad91c288277713d9c18820d8499a7ff69e9a"
+dependencies = [
+ "typenum",
+ "version_check",
+]
+
 [[package]]
 name = "gimli"
 version = "0.27.3"
@@ -740,6 +799,50 @@ version = "2.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9b2a4787296e9989611394c33f193f676704af1686e70b8f8033ab5ba9a35a94"
 
+[[package]]
+name = "pest"
+version = "2.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0d2d1d55045829d65aad9d389139882ad623b33b904e7c9f1b10c5b8927298e5"
+dependencies = [
+ "thiserror",
+ "ucd-trie",
+]
+
+[[package]]
+name = "pest_derive"
+version = "2.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5f94bca7e7a599d89dea5dfa309e217e7906c3c007fb9c3299c40b10d6a315d3"
+dependencies = [
+ "pest",
+ "pest_generator",
+]
+
+[[package]]
+name = "pest_generator"
+version = "2.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "99d490fe7e8556575ff6911e45567ab95e71617f43781e5c05490dc8d75c965c"
+dependencies = [
+ "pest",
+ "pest_meta",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.27",
+]
+
+[[package]]
+name = "pest_meta"
+version = "2.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2674c66ebb4b4d9036012091b537aae5878970d6999f81a265034d85b136b341"
+dependencies = [
+ "once_cell",
+ "pest",
+ "sha2",
+]
+
 [[package]]
 name = "pin-project-lite"
 version = "0.2.10"
@@ -991,6 +1094,17 @@ dependencies = [
  "unsafe-libyaml",
 ]
 
+[[package]]
+name = "sha2"
+version = "0.10.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "479fb9d862239e610720565ca91403019f2f00410f1864c5aa7479b950a76ed8"
+dependencies = [
+ "cfg-if",
+ "cpufeatures",
+ "digest",
+]
+
 [[package]]
 name = "sharded-slab"
 version = "0.1.4"
@@ -1075,6 +1189,26 @@ dependencies = [
  "windows-sys",
 ]
 
+[[package]]
+name = "thiserror"
+version = "1.0.44"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "611040a08a0439f8248d1990b111c95baa9c704c805fa1f62104b39655fd7f90"
+dependencies = [
+ "thiserror-impl",
+]
+
+[[package]]
+name = "thiserror-impl"
+version = "1.0.44"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "090198534930841fab3a5d1bb637cde49e339654e606195f8d9c76eeb081dc96"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.27",
+]
+
 [[package]]
 name = "thread_local"
 version = "1.1.7"
@@ -1253,6 +1387,18 @@ version = "0.2.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3528ecfd12c466c6f163363caf2d02a71161dd5e1cc6ae7b34207ea2d42d81ed"
 
+[[package]]
+name = "typenum"
+version = "1.16.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "497961ef93d974e23eb6f433eb5fe1b7930b659f06d12dec6fc44a8f554c0bba"
+
+[[package]]
+name = "ucd-trie"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ed646292ffc8188ef8ea4d1e0e0150fb15a5c2e12ad9b8fc191ae7a8a7f3c4b9"
+
 [[package]]
 name = "unicode-bidi"
 version = "0.3.13"
@@ -1309,6 +1455,12 @@ version = "0.2.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "accd4ea62f7bb7a82fe23066fb0957d48ef677f6eeb8215f372f52e48bb32426"
 
+[[package]]
+name = "version_check"
+version = "0.9.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
+
 [[package]]
 name = "want"
 version = "0.3.1"
diff --git a/Cargo.toml b/Cargo.toml
index 17d7b67..ea3d5cd 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -16,6 +16,7 @@ url = {version = "*"}
 serde_yaml = {version = "*"}
 serde = {version = "*", features = ["derive"]}
 semver = "1.0.18"
+conventional_commit_parser = "0.9.4"
 
 reqwest = {version = "*"}
 
diff --git a/crates/cuddle-please/Cargo.toml b/crates/cuddle-please/Cargo.toml
index de68749..8501045 100644
--- a/crates/cuddle-please/Cargo.toml
+++ b/crates/cuddle-please/Cargo.toml
@@ -15,6 +15,8 @@ serde.workspace = true
 reqwest = {workspace = true, features = ["blocking", "json"]}
 url.workspace = true
 semver.workspace = true
+conventional_commit_parser.workspace = true
+
 
 [dev-dependencies]
 tracing-test = {workspace = true, features = ["no-env-filter"]}
diff --git a/crates/cuddle-please/src/versioning/conventional_parse.rs b/crates/cuddle-please/src/versioning/conventional_parse.rs
new file mode 100644
index 0000000..a069e69
--- /dev/null
+++ b/crates/cuddle-please/src/versioning/conventional_parse.rs
@@ -0,0 +1,191 @@
+use conventional_commit_parser::commit::{CommitType, ConventionalCommit};
+use semver::Version;
+
+#[derive(Debug, Clone, PartialEq)]
+pub enum VersionIncrement {
+    Major,
+    Minor,
+    Patch,
+    Prerelease,
+}
+
+impl VersionIncrement {
+    pub fn from<C>(cur_version: &Version, commits: C) -> Option<Self>
+    where
+        C: IntoIterator,
+        C::Item: AsRef<str>,
+    {
+        let mut commits = commits.into_iter().peekable();
+        if commits.peek().is_none() {
+            return None;
+        }
+        if let Some(prerelease) = Self::is_prerelease(cur_version) {
+            return Some(prerelease);
+        }
+
+        let commits: Vec<ConventionalCommit> = Self::parse_commits::<C>(commits);
+
+        return Some(Self::from_conventional_commits(commits));
+    }
+
+    #[inline]
+    fn parse_commits<C>(
+        commits: std::iter::Peekable<<C as IntoIterator>::IntoIter>,
+    ) -> Vec<ConventionalCommit>
+    where
+        C: IntoIterator,
+        C::Item: AsRef<str>,
+    {
+        commits
+            .filter_map(|c| conventional_commit_parser::parse(c.as_ref()).ok())
+            .collect()
+    }
+
+    // Find most significant change
+    fn from_conventional_commits(commits: Vec<ConventionalCommit>) -> VersionIncrement {
+        let found_breaking = || commits.iter().any(|c| c.is_breaking_change);
+        let found_feature = || {
+            commits
+                .iter()
+                .any(|c| matches!(c.commit_type, CommitType::Feature))
+        };
+
+        match (found_breaking(), found_feature()) {
+            (true, _) => Self::Major,
+            (_, true) => Self::Minor,
+            (_, false) => Self::Patch,
+        }
+    }
+
+    fn is_prerelease(cur_version: &Version) -> Option<VersionIncrement> {
+        if !cur_version.pre.is_empty() {
+            return Some(Self::Prerelease);
+        }
+        None
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::versioning::conventional_parse::VersionIncrement;
+    use semver::Version;
+    use tracing_test::traced_test;
+
+    use crate::{environment::get_from_environment, gitea_client::Commit};
+
+    #[test]
+    #[traced_test]
+    fn is_prerelease() {
+        let mut version = Version::parse("0.0.0-alpha.1").unwrap();
+
+        let commits = vec![
+            "feat: something",
+            "fix: something",
+            "feat(something): something",
+            "feat(breaking): some
+            
+            BREAKING CHANGE: something",
+        ];
+
+        let actual = VersionIncrement::from(&version, commits).unwrap();
+        assert_eq!(VersionIncrement::Prerelease, actual);
+    }
+    #[test]
+    #[traced_test]
+    fn is_patch() {
+        let mut version = Version::parse("0.0.1").unwrap();
+
+        let commits = vec![
+            "fix: something",
+            "fix: something",
+            "fix: something",
+            "fix: something",
+            "fix: something",
+            "fix: something",
+        ];
+
+        let actual = VersionIncrement::from(&version, commits).unwrap();
+        assert_eq!(VersionIncrement::Patch, actual);
+    }
+
+    #[test]
+    #[traced_test]
+    fn is_minor() {
+        let mut version = Version::parse("0.1.0").unwrap();
+
+        let commits = vec![
+            "feat: something",
+            "feat: something",
+            "fix: something",
+            "fix: something",
+            "fix: something",
+            "fix: something",
+        ];
+
+        let actual = VersionIncrement::from(&version, commits).unwrap();
+        assert_eq!(VersionIncrement::Minor, actual);
+    }
+    #[test]
+    #[traced_test]
+    fn is_major() {
+        let mut version = Version::parse("0.1.0").unwrap();
+
+        let commits = vec![
+            "feat: something",
+            "feat: something
+            
+            BREAKING CHANGE: something",
+            "fix: something",
+            "fix: something",
+            "fix: something",
+            "fix: something",
+        ];
+
+        let actual = VersionIncrement::from(&version, commits).unwrap();
+        assert_eq!(VersionIncrement::Major, actual);
+    }
+
+    #[test]
+    #[traced_test]
+    fn chore_is_patch() {
+        let mut version = Version::parse("0.1.0").unwrap();
+
+        let commits = vec!["chore: something"];
+
+        let actual = VersionIncrement::from(&version, commits).unwrap();
+        assert_eq!(VersionIncrement::Patch, actual);
+    }
+
+    #[test]
+    #[traced_test]
+    fn refactor_is_patch() {
+        let mut version = Version::parse("0.1.0").unwrap();
+
+        let commits = vec!["refactor: something"];
+
+        let actual = VersionIncrement::from(&version, commits).unwrap();
+        assert_eq!(VersionIncrement::Patch, actual);
+    }
+
+    #[test]
+    #[traced_test]
+    fn unknown_commits_are_patch() {
+        let mut version = Version::parse("0.1.0").unwrap();
+
+        let commits = vec!["blablabla some commit"];
+
+        let actual = VersionIncrement::from(&version, commits).unwrap();
+        assert_eq!(VersionIncrement::Patch, actual);
+    }
+
+    #[test]
+    #[traced_test]
+    fn nothing_returns_none() {
+        let mut version = Version::parse("0.1.0").unwrap();
+
+        let commits: Vec<&str> = Vec::new();
+
+        let actual = VersionIncrement::from(&version, commits).is_none();
+        assert_eq!(true, actual);
+    }
+}
diff --git a/crates/cuddle-please/src/versioning/mod.rs b/crates/cuddle-please/src/versioning/mod.rs
index b658cff..746e135 100644
--- a/crates/cuddle-please/src/versioning/mod.rs
+++ b/crates/cuddle-please/src/versioning/mod.rs
@@ -1 +1,3 @@
+pub mod conventional_parse;
+pub mod next_version;
 pub mod semver;
diff --git a/crates/cuddle-please/src/versioning/next_version.rs b/crates/cuddle-please/src/versioning/next_version.rs
new file mode 100644
index 0000000..c4d8aa7
--- /dev/null
+++ b/crates/cuddle-please/src/versioning/next_version.rs
@@ -0,0 +1,170 @@
+use semver::{Prerelease, Version};
+
+use super::conventional_parse::VersionIncrement;
+
+pub trait NextVersion {
+    fn next<I>(&self, commits: I) -> Self
+    where
+        I: IntoIterator,
+        I::Item: AsRef<str>;
+}
+
+impl NextVersion for Version {
+    fn next<I>(&self, commits: I) -> Self
+    where
+        I: IntoIterator,
+        I::Item: AsRef<str>,
+    {
+        let increment = VersionIncrement::from(self, commits);
+
+        match increment {
+            Some(increment) => match increment {
+                VersionIncrement::Major => Self {
+                    major: self.major + 1,
+                    minor: 0,
+                    patch: 0,
+                    pre: Prerelease::EMPTY,
+                    ..self.clone()
+                },
+                VersionIncrement::Minor => Self {
+                    minor: self.minor + 1,
+                    patch: 0,
+                    pre: Prerelease::EMPTY,
+                    ..self.clone()
+                },
+                VersionIncrement::Patch => Self {
+                    patch: self.patch + 1,
+                    pre: Prerelease::EMPTY,
+                    ..self.clone()
+                },
+                VersionIncrement::Prerelease => Self {
+                    pre: {
+                        let release = &self.pre;
+                        let release_version = match release.rsplit_once(".") {
+                            Some((tag, version)) => match version.parse::<usize>() {
+                                Ok(version) => format!("{tag}.{}", version + 1),
+                                Err(_) => format!("{tag}.1"),
+                            },
+                            None => format!("{release}.1"),
+                        };
+                        Prerelease::new(&release_version).expect("prerelease is not valid semver")
+                    },
+                    ..self.clone()
+                },
+            },
+            None => self.clone(),
+        }
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use semver::Version;
+    use tracing_test::traced_test;
+
+    use crate::versioning::next_version::NextVersion;
+
+    #[test]
+    #[traced_test]
+    fn is_no_bump() {
+        let version = Version::parse("0.0.0-prerelease").unwrap();
+        let commits: Vec<&str> = vec![];
+
+        let actual = version.next(commits);
+
+        assert_eq!("0.0.0-prerelease", actual.to_string())
+    }
+
+    #[test]
+    #[traced_test]
+    fn is_prerelease_initial() {
+        let version = Version::parse("0.0.0-prerelease").unwrap();
+        let commits: Vec<&str> = vec!["feat: something"];
+
+        let actual = version.next(commits);
+
+        assert_eq!("0.0.0-prerelease.1", actual.to_string())
+    }
+
+    #[test]
+    #[traced_test]
+    fn is_prerelease_invalid() {
+        let version = Version::parse("0.0.0-prerelease.invalid").unwrap();
+        let commits: Vec<&str> = vec!["feat: something"];
+
+        let actual = version.next(commits);
+
+        assert_eq!("0.0.0-prerelease.1", actual.to_string())
+    }
+
+    #[test]
+    #[traced_test]
+    fn is_prerelease_next() {
+        let version = Version::parse("0.0.0-prerelease.1").unwrap();
+        let commits: Vec<&str> = vec!["feat: something"];
+
+        let actual = version.next(commits);
+
+        assert_eq!("0.0.0-prerelease.2", actual.to_string())
+    }
+
+    #[test]
+    #[traced_test]
+    fn is_patch() {
+        let version = Version::parse("0.0.0").unwrap();
+        let commits: Vec<&str> = vec!["fix: something"];
+
+        let actual = version.next(commits);
+
+        assert_eq!("0.0.1", actual.to_string())
+    }
+
+    #[test]
+    #[traced_test]
+    fn is_minor() {
+        let version = Version::parse("0.1.0").unwrap();
+        let commits: Vec<&str> = vec!["feat: something"];
+
+        let actual = version.next(commits);
+
+        assert_eq!("0.2.0", actual.to_string())
+    }
+    #[test]
+    #[traced_test]
+    fn is_minor_clears_patch() {
+        let version = Version::parse("0.1.1").unwrap();
+        let commits: Vec<&str> = vec!["feat: something"];
+
+        let actual = version.next(commits);
+
+        assert_eq!("0.2.0", actual.to_string())
+    }
+    #[test]
+    #[traced_test]
+    fn is_major() {
+        let version = Version::parse("0.0.0").unwrap();
+        let commits: Vec<&str> = vec![
+            "feat: something
+            
+            BREAKING CHANGE: something",
+        ];
+
+        let actual = version.next(commits);
+
+        assert_eq!("1.0.0", actual.to_string())
+    }
+    #[test]
+    #[traced_test]
+    fn is_major_clears_minor_patch() {
+        let version = Version::parse("1.2.3").unwrap();
+        let commits: Vec<&str> = vec![
+            "feat: something
+            
+            BREAKING CHANGE: something",
+        ];
+
+        let actual = version.next(commits);
+
+        assert_eq!("2.0.0", actual.to_string())
+    }
+}