diff --git a/RELEASES.md b/RELEASES.md
index 3d57b32e..0f3e37d5 100644
--- a/RELEASES.md
+++ b/RELEASES.md
@@ -8,19 +8,20 @@ This version streamlines compiling for WASM.
 
 Rust compiler minimum version is raised to 1.49.
 
-Breaking changes
-----------------
-
-* Rust compiler requirement raised to 1.49.
-* `NativeCallContext::new` taker an additional parameter containing the name of the function called.
-* `Engine::set_doc_comments` is renamed `Engine::enable_doc_comments`.
-
 Bug fixes
 ---------
 
 * Parameters passed to plugin module functions were sometimes erroneously consumed. This is now fixed.
 * Fixes compilation errors in `metadata` feature build.
 * Stacking `!` operators now work properly.
+* Off-by-one error in `insert` method for arrays is fixed.
+
+Breaking changes
+----------------
+
+* Rust compiler requirement raised to 1.49.
+* `NativeCallContext::new` taker an additional parameter containing the name of the function called.
+* `Engine::set_doc_comments` is renamed `Engine::enable_doc_comments`.
 
 New features
 ------------
diff --git a/src/packages/array_basic.rs b/src/packages/array_basic.rs
index 6247e881..95b61dcc 100644
--- a/src/packages/array_basic.rs
+++ b/src/packages/array_basic.rs
@@ -29,7 +29,7 @@ macro_rules! gen_array_functions {
                 pub fn insert(list: &mut Array, position: INT, item: $arg_type) {
                     if position <= 0 {
                         list.insert(0, Dynamic::from(item));
-                    } else if (position as usize) >= list.len() - 1 {
+                    } else if (position as usize) >= list.len() {
                         push(list, item);
                     } else {
                         list.insert(position as usize, Dynamic::from(item));