diff --git a/certbot-dns-google/docs/_ext/jsonlexer.py b/certbot-dns-google/docs/_ext/jsonlexer.py
new file mode 100644
index 000000000..1ad004d2b
--- /dev/null
+++ b/certbot-dns-google/docs/_ext/jsonlexer.py
@@ -0,0 +1,16 @@
+"""Copied from https://stackoverflow.com/a/16863232"""
+
+def setup(app):
+    # enable Pygments json lexer
+    try:
+        import pygments
+        if pygments.__version__ >= '1.5':
+            # use JSON lexer included in recent versions of Pygments
+            from pygments.lexers import JsonLexer
+        else:
+            # use JSON lexer from pygments-json if installed
+            from pygson.json_lexer import JSONLexer as JsonLexer
+    except ImportError:
+        pass  # not fatal if we have old (or no) Pygments and no pygments-json
+    else:
+        app.add_lexer('json', JsonLexer())