diff --git a/Pipfile b/Pipfile
index e0edea9..40866b6 100644
--- a/Pipfile
+++ b/Pipfile
@@ -28,6 +28,7 @@ stripe = "*"
 matplotlib = "*"
 requests = "*"
 python-dotenv = "*"
+ecdsa = "*"
 
 [dev-packages]
 
diff --git a/Pipfile.lock b/Pipfile.lock
index 25156ce..e17b127 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "4f61804f9405ff8f66e41739aeac24a2577f7b64f7d08b93459b568528c4f494"
+            "sha256": "89f5b91fef8e0029cbecf7f83ce1fdc64a64f295161c8c63bfe5940e31d466e1"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -60,6 +60,14 @@
             ],
             "version": "==0.10.0"
         },
+        "ecdsa": {
+            "hashes": [
+                "sha256:867ec9cf6df0b03addc8ef66b56359643cb5d0c1dc329df76ba7ecfe256c8061",
+                "sha256:8f12ac317f8a1318efa75757ef0a651abe12e51fc1af8838fb91079445227277"
+            ],
+            "index": "pypi",
+            "version": "==0.15"
+        },
         "flask": {
             "hashes": [
                 "sha256:4efa1ae2d7c9865af48986de8aeb8504bf32c7f3d6fdc9353d34b21f4b127060",