diff --git a/Sources/WhisperKey/NativeCompositionBridge.swift b/Sources/WhisperKey/NativeCompositionBridge.swift
index e78d110..0406541 100644
--- a/Sources/WhisperKey/NativeCompositionBridge.swift
+++ b/Sources/WhisperKey/NativeCompositionBridge.swift
@@ -28,7 +28,7 @@ final class NativeCompositionBridge: NSObject {
     }
 
     var isAvailable: Bool {
-        inputMethodActive && currentInputSourceID() == Self.inputSourceID
+        inputMethodActive
     }
 
     var isInstalled: Bool {
diff --git a/scripts/install-app.sh b/scripts/install-app.sh
index b110308..3e5cda0 100755
--- a/scripts/install-app.sh
+++ b/scripts/install-app.sh
@@ -4,6 +4,7 @@ set -euo pipefail
 PROJECT_DIR=${0:A:h:h}
 "$PROJECT_DIR/scripts/build-app.sh"
 
+pkill -x WhisperKey 2>/dev/null || true
 ditto "$PROJECT_DIR/dist/WhisperKey.app" "/Applications/WhisperKey.app"
 
 INPUT_METHOD_DIR="$HOME/Library/Input Methods"