diff --git a/requirements.txt b/requirements.txt
index 77d121c..4e58e7e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-pytz==2018.4  # https://github.com/stub42/pytz
+pytz==2020.4  # https://github.com/stub42/pytz
 python-slugify==1.2.5  # https://github.com/un33k/python-slugify
 Pillow==5.1.0  # https://github.com/python-pillow/Pillow
 argon2-cffi==18.1.0  # https://github.com/hynek/argon2_cffi
diff --git a/requirements/base.txt b/requirements/base.txt
index d19bcf4..14f054e 100644
--- a/requirements/base.txt
+++ b/requirements/base.txt
@@ -1,4 +1,4 @@
-pytz==2018.4  # https://github.com/stub42/pytz
+pytz==2020.4  # https://github.com/stub42/pytz
 python-slugify==1.2.5  # https://github.com/un33k/python-slugify
 Pillow==5.1.0  # https://github.com/python-pillow/Pillow
 argon2-cffi==18.1.0  # https://github.com/hynek/argon2_cffi