diff --git a/.gitmodules b/.gitmodules
index 1e01e7f..8495f5a 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,6 @@
 [submodule "libs/f90getopt"]
 	path = libs/f90getopt
 	url = https://github.com/PKM74/f90getopt
+[submodule "libs/stdlib"]
+	path = libs/stdlib
+	url = https://github.com/fortran-lang/stdlib
diff --git a/libs/stdlib b/libs/stdlib
new file mode 160000
index 0000000..30ccd9d
--- /dev/null
+++ b/libs/stdlib
@@ -0,0 +1 @@
+Subproject commit 30ccd9d46496126a24f240ccfa6f9f9c762219a5