diff --git a/src/sentry/loader/browsersdkversion.py b/src/sentry/loader/browsersdkversion.py
index 7a6f06eb572448..683e8e644ca3af 100644
--- a/src/sentry/loader/browsersdkversion.py
+++ b/src/sentry/loader/browsersdkversion.py
@@ -37,7 +37,7 @@ def get_highest_browser_sdk_version(versions):
 
 
 def get_all_browser_sdk_version_versions():
-    return ["latest", "8.x", "7.x", "6.x", "5.x", "4.x"]
+    return ["latest", "9.x", "8.x", "7.x", "6.x", "5.x", "4.x"]
 
 
 def get_all_browser_sdk_version_choices():
diff --git a/src/sentry/projectoptions/defaults.py b/src/sentry/projectoptions/defaults.py
index 92335d82dbd5c4..caebaea21323dd 100644
--- a/src/sentry/projectoptions/defaults.py
+++ b/src/sentry/projectoptions/defaults.py
@@ -53,6 +53,7 @@
 # version is set on a project's DSN.
 register(
     key="sentry:default_loader_version",
+    # TODO(lforst): Make v9 loader default
     epoch_defaults={1: "4.x", 2: "5.x", 7: "6.x", 8: "7.x", 13: "8.x"},
 )
 
@@ -183,7 +184,7 @@
 # The available loader SDK versions
 register(
     key="sentry:loader_available_sdk_versions",
-    epoch_defaults={1: ["8.x", "7.x", "6.x", "5.x", "4.x"], 11: ["8.x", "7.x"]},
+    epoch_defaults={1: ["9.x", "8.x", "7.x", "6.x", "5.x", "4.x"], 11: ["9.x", "8.x", "7.x"]},
 )
 
 # Dynamic sampling rate in project-level "manual" configuration mode