diff --git a/.github/actions/install/action.yml b/.github/actions/install/action.yml
index dda0752d..51de6e87 100644
--- a/.github/actions/install/action.yml
+++ b/.github/actions/install/action.yml
@@ -17,7 +17,7 @@ inputs:
   zig-v8:
     description: 'zig v8 version to install'
     required: false
-    default: 'v0.1.20'
+    default: 'v0.1.21'
   v8:
     description: 'v8 version to install'
     required: false
diff --git a/Dockerfile b/Dockerfile
index 718c3b61..af08c5b6 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,7 +5,7 @@ ARG ZIG=0.14.0
 ARG ZIG_MINISIG=RWSGOq2NVecA2UPNdBUZykf1CCb147pkmdtYxgb3Ti+JO/wCYvhbAb/U
 ARG ARCH=x86_64
 ARG V8=11.1.134
-ARG ZIG_V8=v0.1.20
+ARG ZIG_V8=v0.1.21
 
 RUN apt-get update -yq && \
     apt-get install -yq xz-utils \