diff --git a/requirements.in b/requirements.in
index b40e19b16..3e83f119e 100644
--- a/requirements.in
+++ b/requirements.in
@@ -11,7 +11,7 @@ Flask==1.1.2
 click-datetime==0.2
 # Should be pinned until a new gunicorn release greater than 20.1.0 comes out. (Due to eventlet v0.33 compatibility issues)
 git+https://github.com/benoitc/gunicorn.git@1299ea9e967a61ae2edebe191082fd169b864c64#egg=gunicorn[eventlet]==20.1.0
-iso8601==0.1.14
+iso8601==1.0.2
 itsdangerous==1.1.0
 jsonschema==3.2.0
 marshmallow-sqlalchemy==0.23.1 # pyup: <0.24.0 # marshmallow v3 throws errors
diff --git a/requirements.txt b/requirements.txt
index cf809d69f..f64fa0fa3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -110,7 +110,7 @@ gunicorn @ git+https://github.com/benoitc/gunicorn.git@1299ea9e967a61ae2edebe191
     # via -r requirements.in
 idna==3.3
     # via requests
-iso8601==0.1.14
+iso8601==1.0.2
     # via -r requirements.in
 itsdangerous==1.1.0
     # via