diff --git a/.gitmodules b/.gitmodules
index 84dd331..6c93eba 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,6 @@
 [submodule "nostr_core_lib"]
 	path = nostr_core_lib
 	url = https://git.laantungir.net/laantungir/nostr_core_lib.git
+[submodule "c_utils_lib"]
+	path = c_utils_lib
+	url = ssh://git@git.laantungir.net:2222/laantungir/c_utils_lib.git
diff --git a/c_utils_lib b/c_utils_lib
new file mode 160000
index 0000000..3fd5d09
--- /dev/null
+++ b/c_utils_lib
@@ -0,0 +1 @@
+Subproject commit 3fd5d0911a3da6d4821a9f71342ca45ee6959b25