diff --git a/dev_requirements.txt b/dev_requirements.txt
index 4372d2b646..b3421e55b1 100644
--- a/dev_requirements.txt
+++ b/dev_requirements.txt
@@ -10,7 +10,7 @@ pytest-xdist[psutil]~=2.5.0
 pytest-cov~=3.0.0
 flake8~=4.0.1
 black~=19.10b0
-mypy~=0.930
+mypy~=0.931
 
 # Documentation and examples.
 sphinxcontrib-bibtex~=2.4.1