diff --git a/Dockerfile b/Dockerfile
index 6222113b7..ad2f5e0ef 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,7 +2,8 @@
 FROM alpine:3.10
 LABEL description="OIDC reverse proxy authenticator based on Kubernetes"
 
-RUN apk --no-cache add ca-certificates
+RUN apk --no-cache add ca-certificates \
+    && apk --no-cache add --upgrade openssl
 
 COPY ./bin/kube-oidc-proxy-linux /usr/bin/kube-oidc-proxy