diff --git a/src/engine.rs b/src/engine.rs
index b079ae9a..0b164d91 100644
--- a/src/engine.rs
+++ b/src/engine.rs
@@ -627,17 +627,17 @@ pub struct Limits {
 
 /// Context of a script evaluation process.
 #[derive(Debug)]
-pub struct EvalContext<'e, 'x, 'px: 'x, 'a, 's, 'm, 'pm: 'm, 't, 'pt: 't> {
+pub struct EvalContext<'e, 'x, 'px: 'x, 'a, 's, 'm, 't, 'pt: 't> {
     pub(crate) engine: &'e Engine,
     pub(crate) scope: &'x mut Scope<'px>,
     pub(crate) mods: &'a mut Imports,
     pub(crate) state: &'s mut State,
-    pub(crate) lib: &'m [&'pm Module],
+    pub(crate) lib: &'m [&'m Module],
     pub(crate) this_ptr: &'t mut Option<&'pt mut Dynamic>,
     pub(crate) level: usize,
 }
 
-impl<'e, 'x, 'px, 'a, 's, 'm, 'pm, 't, 'pt> EvalContext<'e, 'x, 'px, 'a, 's, 'm, 'pm, 't, 'pt> {
+impl<'e, 'x, 'px, 'a, 's, 'm, 't, 'pt> EvalContext<'e, 'x, 'px, 'a, 's, 'm, 't, 'pt> {
     /// The current [`Engine`].
     #[inline(always)]
     pub fn engine(&self) -> &Engine {
diff --git a/src/fn_native.rs b/src/fn_native.rs
index 7c69a768..59df6849 100644
--- a/src/fn_native.rs
+++ b/src/fn_native.rs
@@ -55,17 +55,17 @@ pub type Locked<T> = crate::stdlib::sync::RwLock<T>;
 
 /// Context of a native Rust function call.
 #[derive(Debug, Copy, Clone)]
-pub struct NativeCallContext<'e, 'n, 's, 'a, 'm, 'pm: 'm> {
+pub struct NativeCallContext<'e, 'n, 's, 'a, 'm> {
     engine: &'e Engine,
     fn_name: &'n str,
     source: Option<&'s str>,
     pub(crate) mods: Option<&'a Imports>,
-    pub(crate) lib: &'m [&'pm Module],
+    pub(crate) lib: &'m [&'m Module],
 }
 
-impl<'e, 'n, 's, 'a, 'm, 'pm: 'm, M: AsRef<[&'pm Module]> + ?Sized>
+impl<'e, 'n, 's, 'a, 'm, M: AsRef<[&'m Module]> + ?Sized>
     From<(&'e Engine, &'n str, Option<&'s str>, &'a Imports, &'m M)>
-    for NativeCallContext<'e, 'n, 's, 'a, 'm, 'pm>
+    for NativeCallContext<'e, 'n, 's, 'a, 'm>
 {
     #[inline(always)]
     fn from(value: (&'e Engine, &'n str, Option<&'s str>, &'a Imports, &'m M)) -> Self {
@@ -79,8 +79,8 @@ impl<'e, 'n, 's, 'a, 'm, 'pm: 'm, M: AsRef<[&'pm Module]> + ?Sized>
     }
 }
 
-impl<'e, 'n, 'm, 'pm: 'm, M: AsRef<[&'pm Module]> + ?Sized> From<(&'e Engine, &'n str, &'m M)>
-    for NativeCallContext<'e, 'n, '_, '_, 'm, 'pm>
+impl<'e, 'n, 'm, M: AsRef<[&'m Module]> + ?Sized> From<(&'e Engine, &'n str, &'m M)>
+    for NativeCallContext<'e, 'n, '_, '_, 'm>
 {
     #[inline(always)]
     fn from(value: (&'e Engine, &'n str, &'m M)) -> Self {
@@ -94,10 +94,10 @@ impl<'e, 'n, 'm, 'pm: 'm, M: AsRef<[&'pm Module]> + ?Sized> From<(&'e Engine, &'
     }
 }
 
-impl<'e, 'n, 's, 'a, 'm, 'pm> NativeCallContext<'e, 'n, 's, 'a, 'm, 'pm> {
+impl<'e, 'n, 's, 'a, 'm> NativeCallContext<'e, 'n, 's, 'a, 'm> {
     /// Create a new [`NativeCallContext`].
     #[inline(always)]
-    pub fn new(engine: &'e Engine, fn_name: &'n str, lib: &'m impl AsRef<[&'pm Module]>) -> Self {
+    pub fn new(engine: &'e Engine, fn_name: &'n str, lib: &'m impl AsRef<[&'m Module]>) -> Self {
         Self {
             engine,
             fn_name,
@@ -116,7 +116,7 @@ impl<'e, 'n, 's, 'a, 'm, 'pm> NativeCallContext<'e, 'n, 's, 'a, 'm, 'pm> {
         fn_name: &'n str,
         source: &'s Option<&str>,
         imports: &'a mut Imports,
-        lib: &'m impl AsRef<[&'pm Module]>,
+        lib: &'m impl AsRef<[&'m Module]>,
     ) -> Self {
         Self {
             engine,
diff --git a/src/syntax.rs b/src/syntax.rs
index 1ec40876..96498a2c 100644
--- a/src/syntax.rs
+++ b/src/syntax.rs
@@ -61,7 +61,7 @@ impl Expression<'_> {
     }
 }
 
-impl EvalContext<'_, '_, '_, '_, '_, '_, '_, '_, '_> {
+impl EvalContext<'_, '_, '_, '_, '_, '_, '_, '_> {
     /// Evaluate an [expression tree][Expression].
     ///
     /// # WARNING - Low Level API