diff --git a/extra/docker/Dockerfile.master b/extra/docker/Dockerfile.master
index 451123c2b70f58308f8dc845680b976a36bb0206..7c23aa33a4494728697aa8d38fc1a063f4e847c1 100644
--- a/extra/docker/Dockerfile.master
+++ b/extra/docker/Dockerfile.master
@@ -1,7 +1,7 @@
 # -------------------------------------------------------------------------------------------------
 # build stage
 
-FROM alpine:edge AS builder
+FROM alpine:3.9 AS builder
 ENV BASEDIR="/build"
 
 RUN apk add \
@@ -35,7 +35,7 @@ RUN	cmake \
 
 # -------------------------------------------------------------------------------------------------
 # deploy stage
-FROM alpine:edge
+FROM alpine:3.9
 
 LABEL maintainer="peckato1@fit.cvut.cz"
 
diff --git a/extra/docker/Dockerfile.master-cli b/extra/docker/Dockerfile.master-cli
index f056b639f9832da078a0c12ff34c6acaa40ee560..234ca24ea71dc99f864c2ebd09d35cd5e7eae923 100644
--- a/extra/docker/Dockerfile.master-cli
+++ b/extra/docker/Dockerfile.master-cli
@@ -1,7 +1,7 @@
 # -------------------------------------------------------------------------------------------------
 # build stage
 
-FROM alpine:edge AS builder
+FROM alpine:3.9 AS builder
 ENV BASEDIR="/build"
 
 RUN apk add \
@@ -32,7 +32,7 @@ RUN	cmake \
 
 # -------------------------------------------------------------------------------------------------
 # deploy stage
-FROM alpine:edge
+FROM alpine:3.9
 
 LABEL maintainer="peckato1@fit.cvut.cz"