diff --git a/Pipfile b/Pipfile
index 46a13951..78baa235 100644
--- a/Pipfile
+++ b/Pipfile
@@ -29,7 +29,7 @@ markupsafe = ">=1.1.1"
 minizinc = "==0.9.0"
 mysqlclient = "==2.0.3"
 pipenv = "*"
-pycparser = "==2.20"
+pycparser = "==2.21"
 pyjwt = "==2.8.0"
 python-dateutil = "==2.8.2"
 python-dotenv = "==1.0.0"
diff --git a/Pipfile.lock b/Pipfile.lock
index dee4a8c8..9fc27a81 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "b1925938269d7ed3d29d23c9a901df4469e73dfadcb5ad45c1efafb9b29c1365"
+            "sha256": "0dcdf72c498543819b816515a2ac11692513967d047e0e9df41f6dc96b3da4e4"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -555,12 +555,12 @@
         },
         "pycparser": {
             "hashes": [
-                "sha256:2d475327684562c3a96cc71adf7dc8c4f0565175cf86b6d7a404ff4c771f15f0",
-                "sha256:7582ad22678f0fcd81102833f60ef8d0e57288b6b5fb00323d101be910e35705"
+                "sha256:8ee45429555515e1f6b185e78100aea234072576aa43ab53aefcae078162fca9",
+                "sha256:e644fdec12f7872f86c58ff790da456218b10f863970249516d60a5eaca77206"
             ],
             "index": "pypi",
             "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
-            "version": "==2.20"
+            "version": "==2.21"
         },
         "pyjwt": {
             "hashes": [