diff --git a/base/Dockerfile b/base/Dockerfile
index 97df68b..d3ebf21 100644
--- a/base/Dockerfile
+++ b/base/Dockerfile
@@ -35,7 +35,7 @@ RUN \
         bash=5.1.0-r0 \
         curl=7.74.0-r0 \
         jq=1.6-r1 \
-        tzdata=2020f-r0 \
+        tzdata=2021a-r0 \
     \
     && S6_ARCH="${BUILD_ARCH}" \
     && if [ "${BUILD_ARCH}" = "i386" ]; then S6_ARCH="x86"; fi \