diff --git a/infra/core/CMakeLists.txt b/infra/core/CMakeLists.txt
index 342a6e0..eb0a589 100644
--- a/infra/core/CMakeLists.txt
+++ b/infra/core/CMakeLists.txt
@@ -1,4 +1,4 @@
-set(SOURCE stellar_config.cpp stellar_stat.cpp stellar_core.cpp)
+set(SOURCE stellar_config.c stellar_stat.c stellar_core.c)
 set(LIBRARY session_manager plugin_manager ip_reassembly packet_io snowflake packet pthread fieldstat4 toml nmx_pool)
 
 set(PLUGIN http glimpse_detector)
diff --git a/infra/core/stellar_config.cpp b/infra/core/stellar_config.c
similarity index 100%
rename from infra/core/stellar_config.cpp
rename to infra/core/stellar_config.c
diff --git a/infra/core/stellar_core.cpp b/infra/core/stellar_core.c
similarity index 100%
rename from infra/core/stellar_core.cpp
rename to infra/core/stellar_core.c
diff --git a/infra/core/stellar_stat.cpp b/infra/core/stellar_stat.c
similarity index 100%
rename from infra/core/stellar_stat.cpp
rename to infra/core/stellar_stat.c