diff --git a/Dockerfile.amd64 b/Dockerfile.amd64
index dcc7f98..e81d1d5 100644
--- a/Dockerfile.amd64
+++ b/Dockerfile.amd64
@@ -1,7 +1,7 @@
 FROM library/tomcat:9-jre11-openjdk-bullseye
 
 ENV ARCH=amd64 \
-    GUAC_VER=1.5.2 \
+    GUAC_VER=1.5.3 \
     GUACAMOLE_HOME=/app/guacamole \
     PG_MAJOR=9.6 \
     PGDATA=/config/postgres \
diff --git a/Dockerfile.arm64 b/Dockerfile.arm64
index 3e0d251..488c3ac 100644
--- a/Dockerfile.arm64
+++ b/Dockerfile.arm64
@@ -1,6 +1,6 @@
 FROM library/tomcat:9-jre11-openjdk-bullseye
 
-ENV GUAC_VER=1.5.2 \
+ENV GUAC_VER=1.5.3 \
     GUACAMOLE_HOME=/app/guacamole \
     PG_MAJOR=9.6 \
     PGDATA=/config/postgres \