diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index c0e426f2f5..6b389908ab 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -23,16 +23,16 @@ repos:
       stages: [manual]
 
 - repo: https://github.com/executablebooks/mdformat
-  rev: 0.7.22
+  rev: 1.0.0
   hooks:
     - id: mdformat
       args: ["--wrap=120", "--number"]
       additional_dependencies:
         - mdformat-footnote==0.1.2
-        - mdformat-frontmatter==2.0.8
+        - mdformat-frontmatter==2.0.10
         - mdformat-gfm==1.0.0
         - mdformat-gfm-alerts==2.0.0
-        - mdformat-mkdocs==4.5.1
+        - mdformat-mkdocs==5.1.4
         - markdown-it-py==3.0.0
       # Files that mdformat cannot parse:
       exclude: |
diff --git a/source/auth/auth.md b/source/auth/auth.md
index 6843d5cbbc..efaea8779c 100644
--- a/source/auth/auth.md
+++ b/source/auth/auth.md
@@ -375,7 +375,7 @@ When connected to MongoDB 3.2 or earlier:
 
 - source
 
-    MUST be "$external". Defaults to `$external`.
+    MUST be "$external". Defaults to `$external\`.
 
 - password
 
@@ -445,7 +445,7 @@ proprietary implementation called SSPI which is compatible with both Windows and
 
 - source
 
-    MUST be "$external". Defaults to `$external`.
+    MUST be "$external". Defaults to `$external\`.
 
 - password
 
@@ -943,7 +943,7 @@ Examples are provided below.
 
 - source
 
-    MUST be "$external". Defaults to `$external`.
+    MUST be "$external". Defaults to `$external\`.
 
 - password
 
@@ -1252,7 +1252,7 @@ in the MONGODB-OIDC specification, including sections or blocks that specificall
 
 - source
 
-    MUST be "$external". Defaults to `$external`.
+    MUST be "$external". Defaults to `$external\`.
 
 - password