diff --git a/5/alpine/Dockerfile b/5/alpine/Dockerfile
index ac1a930e..33b23382 100644
--- a/5/alpine/Dockerfile
+++ b/5/alpine/Dockerfile
@@ -47,7 +47,7 @@ RUN set -eux; \
 ENV GHOST_INSTALL /var/lib/ghost
 ENV GHOST_CONTENT /var/lib/ghost/content
 
-ENV GHOST_VERSION 5.90.2
+ENV GHOST_VERSION 5.91.0
 
 RUN set -eux; \
 	mkdir -p "$GHOST_INSTALL"; \
diff --git a/5/debian/Dockerfile b/5/debian/Dockerfile
index 7a1b7436..90711811 100644
--- a/5/debian/Dockerfile
+++ b/5/debian/Dockerfile
@@ -43,7 +43,7 @@ RUN set -eux; \
 ENV GHOST_INSTALL /var/lib/ghost
 ENV GHOST_CONTENT /var/lib/ghost/content
 
-ENV GHOST_VERSION 5.90.2
+ENV GHOST_VERSION 5.91.0
 
 RUN set -eux; \
 	mkdir -p "$GHOST_INSTALL"; \