diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 35933b8..c2ee78b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,7 +14,7 @@ jobs:
       matrix:
         include:
           - crystal_major_minor: '1.13'
-            crystal_full: '1.13.2'
+            crystal_full: '1.13.3'
             target_platforms: linux/amd64,linux/arm64
             concurrency_group: compile-crystal
 
diff --git a/docker/1.13/Dockerfile b/docker/1.13/Dockerfile
index 2fe10af..215357f 100644
--- a/docker/1.13/Dockerfile
+++ b/docker/1.13/Dockerfile
@@ -33,8 +33,8 @@ RUN --mount=type=cache,sharing=private,target=/var/cache/apk \
 RUN set -eux -o pipefail; \
     cd /tmp; \
     export \
-        CRYSTAL_VERSION=1.13.2 \
-        CRYSTAL_SHA256=c537336c10ff0d9cd3673e195165667e478be92e0a8cc6664bdec5b960745c4b \
+        CRYSTAL_VERSION=1.13.3 \
+        CRYSTAL_SHA256=b060a75a7c3d29424f1d16bfb42ee4a46055fa218b964556b81bd1885cb30d77 \
     ; \
     { \
         curl --fail -Lo crystal.tar.gz https://github.com/crystal-lang/crystal/archive/refs/tags/${CRYSTAL_VERSION}.tar.gz; \