diff --git a/MODULE.bazel b/MODULE.bazel
index 89289f88c..cfcda45af 100644
--- a/MODULE.bazel
+++ b/MODULE.bazel
@@ -26,7 +26,7 @@ bazel_dep(name = "googletest", version = "1.17.0.bcr.2")
 bazel_dep(name = "boost.multiprecision", version = "1.90.0.bcr.1")
 bazel_dep(name = "boost.unordered", version = "1.90.0.bcr.1")
 #### M4/Flex/Bison
-bazel_dep(name = "rules_m4", version = "0.3")
+bazel_dep(name = "rules_m4", version = "0.3.bcr.1")
 bazel_dep(name = "rules_flex", version = "0.4")
 bazel_dep(name = "rules_bison", version = "0.4")