diff --git a/packages/selenium-devtools-py/changes/pin-backend-2.0.0.md b/packages/selenium-devtools-py/changes/pin-backend-2.0.0.md
new file mode 100644
index 00000000..7f5cf2e1
--- /dev/null
+++ b/packages/selenium-devtools-py/changes/pin-backend-2.0.0.md
@@ -0,0 +1,5 @@
+---
+patch
+---
+
+Pin the backend a `pip install` user runs to 2.0.0.
diff --git a/packages/selenium-devtools-py/src/selenium_devtools/constants.py b/packages/selenium-devtools-py/src/selenium_devtools/constants.py
index 9f85cf47..508b2447 100644
--- a/packages/selenium-devtools-py/src/selenium_devtools/constants.py
+++ b/packages/selenium-devtools-py/src/selenium_devtools/constants.py
@@ -70,7 +70,7 @@
 # cross-ecosystem resolver, so this constant *is* the version link — bump it in
 # the same change that regenerates _contract.py. 1.10.0 is the first version
 # carrying the `devtools-backend` bin; `npx` cannot start anything older.
-BACKEND_NPM_VERSION = "1.11.2"
+BACKEND_NPM_VERSION = "2.0.0"
 BACKEND_NPM_PACKAGE = "@wdio/devtools-backend"
 BACKEND_SPAWN_TIMEOUT_S = 40.0
 # A cold `npx` has to DOWNLOAD the backend and its dependencies before the