diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0e3fa94..61fce57 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -288,7 +288,7 @@
 
 # find PCRE2 library
 unset(PCRE2_LIBRARY CACHE)
-find_package(PCRE2 10.30 REQUIRED)
+find_package(PCRE2 10.21 REQUIRED)
 include_directories(${PCRE2_INCLUDE_DIRS})
 target_link_libraries(yang ${PCRE2_LIBRARIES})