diff --git a/Dockerfile b/Dockerfile
index 8b9e1b2..8780fc7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -36,8 +36,8 @@ RUN ln -sf $ANDROID_HOME/ndk/$NDK_VER $ANDROID_HOME/ndk-bundle
 ## - docker run --rm debian:stretch grep '^hosts:' /etc/nsswitch.conf
 RUN echo 'hosts: files dns' > /etc/nsswitch.conf
 
-ENV GOLANG_VERSION=1.19.5.linux-amd64
-ENV GOLANG_SHA256=36519702ae2fd573c9869461990ae550c8c0d955cd28d2827a6b159fda81ff95
+ENV GOLANG_VERSION=1.21.5.linux-amd64
+ENV GOLANG_SHA256=e2bc0b3e4b64111ec117295c088bde5f00eeed1567999ff77bc859d7df70078e
 
 RUN set -eux; \
 	apt-get update; \