diff --git a/Dockerfile b/Dockerfile
index 19fc525..8bc677e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -17,7 +17,6 @@ RUN echo \
       "$(. /etc/os-release && echo "$VERSION_CODENAME")" stable" | \
       tee /etc/apt/sources.list.d/docker.list > /dev/null
 
-RUN apt-get update
 RUN apt-get install -y docker-ce-cli
 
 # Install tea
@@ -26,7 +25,6 @@ RUN git clone https://gitea.com/gitea/tea.git
 RUN cd tea && make && make install
 
 # Install flutter
-RUN apt-get update
 RUN apt-get install -y\
       curl git wget \
       unzip libgconf-2-4 gdb \
@@ -51,5 +49,4 @@ RUN flutter upgrade
 USER root
 
 #Install OpenSSL
-RUN apt-get update
 RUN apt-get install -y openssl
diff --git a/alpine/Dockerfile b/alpine/Dockerfile
index 5413f9e..de43a92 100644
--- a/alpine/Dockerfile
+++ b/alpine/Dockerfile
@@ -9,8 +9,12 @@ RUN apk add --no-cache docker docker-compose
 RUN apk add --no-cache tea
 
 # Install flutter
-RUN apk add --no-cache --repository=https://dl-cdn.alpinelinux.org/alpine/edge/testing flutter 
+RUN git clone https://github.com/flutter/flutter.git /usr/local/flutter
+RUN git config --global --add safe.directory /usr/local/flutter
 
+ENV PATH="/usr/local/flutter/bin:/usr/local/flutter/bin/cache/dart-sdk/bin:${PATH}"
+
+RUN chown -R jenkins:jenkins /usr/local/flutter
 # Run flutter doctor and upgrade
 USER jenkins