diff --git a/news/1 Enhancements/961.md b/news/1 Enhancements/961.md
new file mode 100644
index 000000000000..431028ffca82
--- /dev/null
+++ b/news/1 Enhancements/961.md	
@@ -0,0 +1,2 @@
+Enable syntax highlighting for `requirements.in` files as used by
+e.g. [pip-tools](https://github.com/jazzband/pip-tools).
diff --git a/package.json b/package.json
index 96fbb30580c6..43f9562cc0ca 100644
--- a/package.json
+++ b/package.json
@@ -1551,11 +1551,14 @@
                     "requirements.txt"
                 ],
                 "filenames": [
-                    "requirements.txt"
+                    "requirements.txt",
+                    "requirements.in"
                 ],
                 "filenamePatterns": [
                     "*-requirements.txt",
-                    "requirements-*.txt"
+                    "requirements-*.txt",
+                    "*-requirements.in",
+                    "requirements-*.in"
                 ],
                 "configuration": "./languages/pip-requirements.json"
             },