diff --git a/Dockerfile b/Dockerfile
index 7ecbdae..827fd50 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.7.3-alpine@sha256:083192ca72d1e948e76377b8e011d26da64fe160c8a9a162d04c4a89b2d01e44
+FROM python:3.7.3-alpine@sha256:e97a114cbc41b529b2d2e5fc0d9fbf573a4b66e8de887220dc002f186a8e5a09
 
 RUN mkdir -p /app/deploy
 
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 29b0ab4..c998fcb 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -10,7 +10,7 @@ attrs==19.1.0             # via black, pytest
 backcall==0.1.0           # via ipython
 bandit==1.6.0
 black==19.3b0
-certifi==2019.3.9         # via requests
+certifi==2019.6.16        # via requests
 chardet==3.0.4            # via requests
 click==7.0                # via black, pip-tools
 codecov==2.0.15