diff --git a/.gitmodules b/.gitmodules
index 6d435d0..537eb1e 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,9 +1,6 @@
-[submodule "axc"]
-	path = axc
-	url = https://github.com/gkdr/axc
-[submodule "omemo"]
-	path = omemo
-	url = https://github.com/gkdr/libomemo
+[submodule "fmt"]
+	path = deps/fmt
+	url = https://github.com/fmtlib/fmt
 [submodule "diff"]
-	path = diff
+	path = deps/diff
 	url = https://github.com/kristapsdz/libdiff
diff --git a/deps/diff b/deps/diff
new file mode 160000
index 0000000..aadb3d7
--- /dev/null
+++ b/deps/diff
@@ -0,0 +1 @@
+Subproject commit aadb3d7fe4dcb4b212c77e4fc6c2599826aeb50a
diff --git a/deps/fmt b/deps/fmt
new file mode 160000
index 0000000..9a1beab
--- /dev/null
+++ b/deps/fmt
@@ -0,0 +1 @@
+Subproject commit 9a1beab5747d5afadcc4d29bf8fe50f119484a5d