diff --git a/.github/workflows/zig-build.yml b/.github/workflows/zig-build.yml
index 881be4890..bec26cbc7 100644
--- a/.github/workflows/zig-build.yml
+++ b/.github/workflows/zig-build.yml
@@ -14,7 +14,7 @@ jobs:
 
       matrix:
         # TODO: move from nightly to zig 0.12 final when released.
-        zig_version: [ "0.12.0-dev.2833+8802ec583" ]
+        zig_version: [ "0.12.0-dev.3666+a2b834e8c" ]
         os: [ macos-latest, ubuntu-latest ]
         gc_assertions: [ true ]
         large_config: [ false ]
diff --git a/.github/workflows/zig-cross-compile.yml b/.github/workflows/zig-cross-compile.yml
index 14c2a9912..ebdcdebd8 100644
--- a/.github/workflows/zig-cross-compile.yml
+++ b/.github/workflows/zig-cross-compile.yml
@@ -14,7 +14,7 @@ jobs:
       fail-fast: false
       matrix:
         # TODO: move from nightly to zig 0.12 final when released.
-        zig_version: [ "0.12.0-dev.2833+8802ec583" ]
+        zig_version: [ "0.12.0-dev.3666+a2b834e8c" ]
         # Some of the triples are commented out just to speedup this workflow.
         ttriple: [
           aarch64-linux-gnu,