diff --git a/version_config.cmake b/version_config.cmake
index 213036b3..5a9661f0 100644
--- a/version_config.cmake
+++ b/version_config.cmake
@@ -141,7 +141,7 @@ set(DEFAULT_STIR_TAG rel_6.2.0)
 
 ## SIRF
 set(DEFAULT_SIRF_URL https://github.com/SyneRBI/SIRF)
-set(DEFAULT_SIRF_TAG v3.8.0)
+set(DEFAULT_SIRF_TAG a7d4e9d700c2d320946437b5c9e15a94d282cef1)
 
 ## pet-rd-tools
 set(DEFAULT_pet_rd_tools_URL https://github.com/UCL/pet-rd-tools)