diff --git a/.docker/Dockerfile.alpine b/.docker/Dockerfile.alpine
index be47ab1f..6b83368f 100644
--- a/.docker/Dockerfile.alpine
+++ b/.docker/Dockerfile.alpine
@@ -3,12 +3,11 @@
 
 # Note: Alpine 3.20 builds tesseract with --enable-opencl, which is not
 # supported by anyone. OCRmyPDF is not compatible with Alpine 3.20.0
-# through 3.20.3. The Alpine issue should be fixed in 3.21.0. It is
-# not clear if 3.20.4+ will have the fix.
+# through 3.20.3. The issue is fixed in 3.21.
 # Details
 #  https://gitlab.alpinelinux.org/alpine/aports/-/issues/16143
 #  https://github.com/ocrmypdf/OCRmyPDF/issues/1395
-FROM alpine:3.19 AS base
+FROM alpine:3.21 AS base
 
 ENV LANG=C.UTF-8
 ENV TZ=UTC