diff --git a/requirements.in b/requirements.in
index a85caacf..bd1c6f47 100644
--- a/requirements.in
+++ b/requirements.in
@@ -329,7 +329,7 @@ python-dateutil==2.9.0.post0
     #   google-cloud-bigquery
     #   matplotlib
     #   pandas
-python-discovery==1.3.0
+python-discovery==1.4.0
     # via
     #   tox
     #   virtualenv
diff --git a/requirements.txt b/requirements.txt
index 9eb3a49e..57df0e5a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2053,9 +2053,9 @@ python-dateutil==2.9.0.post0 \
     #   google-cloud-bigquery
     #   matplotlib
     #   pandas
-python-discovery==1.3.0 \
-    --hash=sha256:441d9ced3dfce36e113beb35ca302c71c7ef06f3c0f9c227a0b9bb3bd49b9e9f \
-    --hash=sha256:d098f1e86be5d45fe4d14bf1029294aabbd332f4321179dec85e76cddce834b0
+python-discovery==1.4.0 \
+    --hash=sha256:26ed78d703e234879a66244c7d4114563fb13ec5cd30a2d1357e5fb4850782da \
+    --hash=sha256:eb8bc7daad3c226c147e45bb4e970a1feb1bf4048ee178e6db59e197b8010ce3
     # via
     #   -r requirements.in
     #   tox