diff --git a/.circleci/config.yml b/.circleci/config.yml
index 5ae10cb..b3dceab 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -1,7 +1,7 @@
 version: 2.1
 orbs:
   docker-publish: circleci/docker-publish@0.1.7
-  shellcheck: circleci/shellcheck@2.2.2
+  shellcheck: circleci/shellcheck@2.2.4
 
 x-aliases:
   docker-publish-args: &docker-publish-args
diff --git a/Dockerfile b/Dockerfile
index 545a7dd..c37994f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.13@sha256:d0710affa17fad5f466a70159cc458227bd25d4afb39514ef662ead3e6c99515 AS builder
+FROM alpine:3.13@sha256:69e70a79f2d41ab5d637de98c1e0b055206ba40a8145e7bddb55ccc04e13cf8f AS builder
 
 ENV GIT_CRYPT_VERSION 0.6.0
 ENV GIT_CRYPT_CHECKSUM 777c0c7aadbbc758b69aff1339ca61697011ef7b92f1d1ee9518a8ee7702bb78
@@ -17,7 +17,7 @@ RUN curl -fSsL https://github.com/AGWA/git-crypt/archive/$GIT_CRYPT_VERSION.tar.
     && make \
     && make install PREFIX=/usr
 
-FROM alpine:3.13@sha256:d0710affa17fad5f466a70159cc458227bd25d4afb39514ef662ead3e6c99515
+FROM alpine:3.13@sha256:69e70a79f2d41ab5d637de98c1e0b055206ba40a8145e7bddb55ccc04e13cf8f
 
 RUN apk --update --no-cache add \
     git \