diff --git a/doc/Pipfile b/doc/Pipfile
index 1af0d6c407..31f8f37e9e 100644
--- a/doc/Pipfile
+++ b/doc/Pipfile
@@ -9,7 +9,7 @@ Pygments = "==2.4.0"
 Sphinx = "==3.0.4"
 sphinx-prompt = "==1.1.0"
 # Lock
-babel = "==2.8.0"
+babel = "==2.9.1"
 certifi = "==2019.11.28"
 chardet = "==3.0.4"
 docutils = "==0.16"
diff --git a/doc/Pipfile.lock b/doc/Pipfile.lock
index 9ea21374b9..44558e8ae5 100644
--- a/doc/Pipfile.lock
+++ b/doc/Pipfile.lock
@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "4c5cf074fbcaf976eca6fb5dcb37e7de56d6fdaf9adc0208ab0852be6f04117a"
+            "sha256": "023e68c5af5c85e1f81f2bef9cd91960dbea6c0048ea5925e4a4f87ee581a875"
         },
         "pipfile-spec": 6,
         "requires": {},
@@ -24,11 +24,11 @@
         },
         "babel": {
             "hashes": [
-                "sha256:1aac2ae2d0d8ea368fa90906567f5c08463d98ade155c0c4bfedd6a0f7160e38",
-                "sha256:d670ea0b10f8b723672d3a6abeb87b565b244da220d76b4dba1b66269ec152d4"
+                "sha256:ab49e12b91d937cd11f0b67cb259a57ab4ad2b59ac7a3b41d6c06c0ac5b0def9",
+                "sha256:bc0c176f9f6a994582230df350aa6e05ba2ebe4b3ac317eab29d9be5d2768da0"
             ],
             "index": "pypi",
-            "version": "==2.8.0"
+            "version": "==2.9.1"
         },
         "certifi": {
             "hashes": [