diff --git a/Pipfile.lock b/Pipfile.lock
index 6113565eb..fbb984aae 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -691,12 +691,12 @@
         },
         "croniter": {
             "hashes": [
-                "sha256:96e14cdd5dcb479dd48d7db14b53d8434b188dfb9210448bef6f65663524a6f0",
-                "sha256:f9dcd4bdb6c97abedb6f09d6ed3495b13ede4d4544503fa580b6372a56a0c520"
+                "sha256:312717b8017ad6052817934af563f6754b1f25cb942dcca1e617240aca4aa254",
+                "sha256:3df735b70d005b68414d80728987ecba4d71054a1bb1b011f6d475bdefdbeddd"
             ],
             "index": "pypi",
             "markers": "python_version >= '2.6' and python_version not in '3.0, 3.1, 3.2, 3.3'",
-            "version": "==3.0.4"
+            "version": "==4.0.0"
         },
         "cryptography": {
             "hashes": [