diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Revision history for ogma-language-c
 
+## [1.13.0] - 2026-03-21
+
+* Version bump (1.13.0) (#373).
+* Constrain version of `alex` in Cabal file (#370).
+
 ## [1.12.0] - 2026-01-21
 
 * Version bump 1.12.0 (#336).
diff --git a/ogma-language-c.cabal b/ogma-language-c.cabal
--- a/ogma-language-c.cabal
+++ b/ogma-language-c.cabal
@@ -18,7 +18,7 @@
 cabal-version:       2.0
 build-type:          Custom
 name:                ogma-language-c
-version:             1.12.0
+version:             1.13.0
 homepage:            https://github.com/nasa/ogma
 bug-reports:         https://github.com/nasa/ogma/issues
 license:             Apache-2.0
@@ -79,7 +79,7 @@
     , array >= 0.5.2.0  && < 0.6
 
   build-tool-depends:
-      alex:alex   >= 3
+      alex:alex   >= 3 && (< 3.5.4.1 || > 3.5.4.1)
     , BNFC:bnfc   >= 2.9.4
     , happy:happy >= 1.19