diff --git a/5.0/apache/Dockerfile b/5.0/apache/Dockerfile
index a39913e..cabda6b 100644
--- a/5.0/apache/Dockerfile
+++ b/5.0/apache/Dockerfile
@@ -60,8 +60,8 @@ RUN a2enmod headers rewrite remoteip; \
 # Use the default production configuration
 RUN mv "$PHP_INI_DIR/php.ini-production" "$PHP_INI_DIR/php.ini"
 
-ARG version="5.6.20+230516"
-ARG sha256_checksum="a22e9f6a4fad21b7c52df2fed0cf86baf5651466f2715026bd16b0cf8578ccb8"
+ARG version="5.6.21+230518"
+ARG sha256_checksum="47ae13c225b7986e65913e3d2206fd53a7acf511166d2d1a73b5257830eacfef"
 ARG archive_url="https://github.com/LimeSurvey/LimeSurvey/archive/${version}.tar.gz"
 ARG USER=www-data
 ARG LISTEN_PORT=8080
diff --git a/5.0/fpm-alpine/Dockerfile b/5.0/fpm-alpine/Dockerfile
index 536ae19..5659137 100644
--- a/5.0/fpm-alpine/Dockerfile
+++ b/5.0/fpm-alpine/Dockerfile
@@ -34,8 +34,8 @@ RUN set -ex; \
         tidy \
         zip
 
-ARG version="5.6.20+230516"
-ARG sha256_checksum="a22e9f6a4fad21b7c52df2fed0cf86baf5651466f2715026bd16b0cf8578ccb8"
+ARG version="5.6.21+230518"
+ARG sha256_checksum="47ae13c225b7986e65913e3d2206fd53a7acf511166d2d1a73b5257830eacfef"
 ARG archive_url="https://github.com/LimeSurvey/LimeSurvey/archive/${version}.tar.gz"
 ARG USER=www-data
 ENV LIMESURVEY_VERSION=$version
diff --git a/5.0/fpm/Dockerfile b/5.0/fpm/Dockerfile
index 48b8054..f046a93 100644
--- a/5.0/fpm/Dockerfile
+++ b/5.0/fpm/Dockerfile
@@ -46,8 +46,8 @@ RUN set -ex; \
         tidy \
         zip
 
-ARG version="5.6.20+230516"
-ARG sha256_checksum="a22e9f6a4fad21b7c52df2fed0cf86baf5651466f2715026bd16b0cf8578ccb8"
+ARG version="5.6.21+230518"
+ARG sha256_checksum="47ae13c225b7986e65913e3d2206fd53a7acf511166d2d1a73b5257830eacfef"
 ARG archive_url="https://github.com/LimeSurvey/LimeSurvey/archive/${version}.tar.gz"
 ARG USER=www-data
 ENV LIMESURVEY_VERSION=$version