diff --git a/common/CMakeLists.txt b/common/CMakeLists.txt
index db5d4094a17b8..a7ff3ac16c446 100644
--- a/common/CMakeLists.txt
+++ b/common/CMakeLists.txt
@@ -121,8 +121,8 @@ if (LLAMA_LLGUIDANCE)
 
     ExternalProject_Add(llguidance_ext
         GIT_REPOSITORY https://github.com/guidance-ai/llguidance
-        # v0.7.19 (+ fancy-regex build fix):
-        GIT_TAG b59f98f85269892a7de3d3641ad155366f13daa6
+        # v0.7.20 (+ fix to build on GCC 15):
+        GIT_TAG b5b8b64dba11c4e4ee6b1d1450d3a3ae279891e8
         PREFIX ${CMAKE_BINARY_DIR}/llguidance
         SOURCE_DIR ${LLGUIDANCE_SRC}
         BUILD_IN_SOURCE TRUE