diff --git a/requirements.api.txt b/requirements.api.txt
index fe6a5b213..5e31804b8 100644
--- a/requirements.api.txt
+++ b/requirements.api.txt
@@ -1,4 +1,4 @@
-delphi_utils==0.3.6
+delphi_utils==0.3.15
 epiweeks==2.1.2
 Flask==2.2.2
 itsdangerous<2.1
diff --git a/requirements.dev.txt b/requirements.dev.txt
index 88a84acfb..0bd175eeb 100644
--- a/requirements.dev.txt
+++ b/requirements.dev.txt
@@ -2,7 +2,7 @@ aiohttp==3.8.3
 black>=20.8b1
 bump2version==1.0.1
 covidcast==0.1.5
-delphi_utils==0.3.6
+delphi_utils==0.3.15
 docker==6.0.1
 dropbox==11.36.0
 freezegun==1.2.2