diff --git a/assets/Dockerfile b/assets/Dockerfile
index 5e42871..4eca50b 100644
--- a/assets/Dockerfile
+++ b/assets/Dockerfile
@@ -1,10 +1,10 @@
 # Dockerfile for pysen-test
-FROM alpine:3.13.2
+FROM alpine:3.14.6
 
-COPY --from=python:3.6.13-alpine3.13 /usr/local/ /usr/local/
-COPY --from=python:3.7.10-alpine3.13 /usr/local/ /usr/local/
-COPY --from=python:3.8.8-alpine3.13 /usr/local/ /usr/local/
-COPY --from=python:3.9.2-alpine3.13 /usr/local/ /usr/local/
+COPY --from=python:3.6.13-alpine3.14 /usr/local/ /usr/local/
+COPY --from=python:3.7.10-alpine3.14 /usr/local/ /usr/local/
+COPY --from=python:3.8.8-alpine3.14 /usr/local/ /usr/local/
+COPY --from=python:3.9.2-alpine3.14 /usr/local/ /usr/local/
 COPY --from=python:3.10.4-alpine3.14 /usr/local/ /usr/local/
 
 RUN apk add --no-cache expat gcc libffi musl-dev \
diff --git a/tox.ini b/tox.ini
index 938d00c..53eef83 100644
--- a/tox.ini
+++ b/tox.ini
@@ -3,7 +3,7 @@ envlist = py{36,37}-dacite{110,120,150}-isort43-black20, py37-dacite150-isort{43
 
 [testenv]
 deps =
-    pytest >=5.4.0,<6.0.0
+    pytest >=6.2.5,<7.0.0
     dacite110: dacite>=1.1.0,<1.2.0
     dacite120: dacite>=1.2.0,<1.3.0
     dacite150: dacite>=1.5.0,<2.0.0