diff --git a/grc/decryption/CMakeLists.txt b/grc/decryption/CMakeLists.txt
index 29d86f4..e71e466 100644
--- a/grc/decryption/CMakeLists.txt
+++ b/grc/decryption/CMakeLists.txt
@@ -18,5 +18,6 @@
 # Boston, MA 02110-1301, USA.
 
 install(FILES
-    gsm_decryption.xml DESTINATION share/gnuradio/grc/blocks
+    gsm_decryption.block.yml
+    DESTINATION share/gnuradio/grc/blocks
 )