diff --git a/infra/packet_io/CMakeLists.txt b/infra/packet_io/CMakeLists.txt
index bf4a850..75afae0 100644
--- a/infra/packet_io/CMakeLists.txt
+++ b/infra/packet_io/CMakeLists.txt
@@ -1,3 +1,3 @@
-add_library(packet_io dumpfile_io.cpp marsio_io.cpp packet_io.cpp)
+add_library(packet_io dumpfile_io.c marsio_io.c packet_io.c)
 target_include_directories(packet_io PUBLIC ${CMAKE_CURRENT_LIST_DIR})
 target_link_libraries(packet_io marsio pcap packet)
\ No newline at end of file
diff --git a/infra/packet_io/dumpfile_io.cpp b/infra/packet_io/dumpfile_io.c
similarity index 100%
rename from infra/packet_io/dumpfile_io.cpp
rename to infra/packet_io/dumpfile_io.c
diff --git a/infra/packet_io/marsio_io.cpp b/infra/packet_io/marsio_io.c
similarity index 100%
rename from infra/packet_io/marsio_io.cpp
rename to infra/packet_io/marsio_io.c
diff --git a/infra/packet_io/packet_io.cpp b/infra/packet_io/packet_io.c
similarity index 100%
rename from infra/packet_io/packet_io.cpp
rename to infra/packet_io/packet_io.c