diff --git a/requirements-dev.txt b/requirements-dev.txt
index 46352ee..8ced67f 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -18,4 +18,4 @@ requests-oauthlib==0.6.0
 six==1.10.0
 git+https://github.com/TamiaLab/PySkCode.git
 tweepy==3.5.0
-urllib3==1.24.2
+urllib3==1.26.5
diff --git a/requirements.txt b/requirements.txt
index a392e1d..c65eece 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -14,4 +14,4 @@ requests-oauthlib==0.6.0
 six==1.10.0
 git+https://github.com/TamiaLab/PySkCode.git
 tweepy==3.5.0
-urllib3==1.24.2
+urllib3==1.26.5