diff --git a/5.5/Dockerfile b/5.5/Dockerfile
index a91c46282..8efa0631f 100644
--- a/5.5/Dockerfile
+++ b/5.5/Dockerfile
@@ -30,7 +30,7 @@ RUN apt-get update && apt-get install -y perl --no-install-recommends && rm -rf
 RUN apt-get update && apt-get install -y libaio1 pwgen && rm -rf /var/lib/apt/lists/*
 
 ENV MYSQL_MAJOR 5.5
-ENV MYSQL_VERSION 5.5.54
+ENV MYSQL_VERSION 5.5.55
 
 RUN apt-get update && apt-get install -y ca-certificates wget --no-install-recommends && rm -rf /var/lib/apt/lists/* \
 	&& wget "https://cdn.mysql.com/Downloads/MySQL-$MYSQL_MAJOR/mysql-$MYSQL_VERSION-linux2.6-x86_64.tar.gz" -O mysql.tar.gz \