diff --git a/requirements-dev.txt b/requirements-dev.txt
index 3c5353db..226239ee 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -12,5 +12,6 @@ fastapi
 pydantic
 numpy
 scipy
+mypy_boto3_s3
 
 -r requirements-ext.txt
diff --git a/tox.ini b/tox.ini
index 595cd458..355a0732 100644
--- a/tox.ini
+++ b/tox.ini
@@ -10,6 +10,7 @@ deps=
     fastapi
     numpy
     scipy
+    mypy_boto3_s3
 extras=
     yaml
     pydantic
@@ -68,6 +69,7 @@ commands=
 deps=
     httpx
     fastapi
+    mypy_boto3_s3
 extras=
     yaml
     flask