diff --git a/devertexwahn/.bazelversion b/devertexwahn/.bazelversion
index cd1d2e94..815da58b 100644
--- a/devertexwahn/.bazelversion
+++ b/devertexwahn/.bazelversion
@@ -1 +1 @@
-8.0.1
+7.4.1
diff --git a/devertexwahn/MODULE.bazel b/devertexwahn/MODULE.bazel
index 91309c8d..6c885d48 100644
--- a/devertexwahn/MODULE.bazel
+++ b/devertexwahn/MODULE.bazel
@@ -141,25 +141,23 @@ local_path_override(
 )
 
 #-------------------------------------------------------------------------------------
-# LLVM toolchain for bazel
+# LLVM toolchain for Bazel
 #-------------------------------------------------------------------------------------
 
-bazel_dep(name = "toolchains_llvm", version = "0.10.3")
+bazel_dep(name = "toolchains_llvm", version = "1.2.0")
 git_override(
     module_name = "toolchains_llvm",
-    commit = "bba94f8138ab454d70afcd263788b34e2801e2ba",
+    commit = "b3c96d2dbc698eab752366bbe747e2a7df7fa504",
     remote = "https://github.com/bazel-contrib/toolchains_llvm.git",
 )
 
-bazel_dep(name = "rules_foreign_cc", version = "0.12.0")
-
 # Configure and register the toolchain.
 llvm = use_extension("@toolchains_llvm//toolchain/extensions:llvm.bzl", "llvm")
 
 LLVM_VERSIONS = {
-    "": "16.0.0",  # Default version 16.0.0
-    "darwin-aarch64": "16.0.5",
-    "darwin-x86_64": "15.0.7",
+    "": "19.1.3",  # Default version 19.1.3
+    "darwin-aarch64": "19.1.3",
+    "darwin-x86_64": "19.1.3",
 }
 
 llvm.toolchain(
@@ -168,7 +166,7 @@ llvm.toolchain(
 )
 use_repo(llvm, "llvm_toolchain", "llvm_toolchain_llvm")
 
-register_toolchains("@llvm_toolchain//:all")
+#register_toolchains("@llvm_toolchain//:all")
 
 #-------------------------------------------------------------------------------------
 # Python