diff --git a/.gitmodules b/.gitmodules
index 2167c4a..b17471a 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -16,3 +16,6 @@
 [submodule "caching"]
 	path = caching
 	url = https://git.mount-mockery.de/pylib/caching
+[submodule "tcp_socket"]
+	path = tcp_socket
+	url = https://git.mount-mockery.de/pylib/tcp_socket
diff --git a/Makefile b/Makefile
index a9ce63d..c97563f 100644
--- a/Makefile
+++ b/Makefile
@@ -13,6 +13,7 @@ MODULES       = $(sort \
     stringtools.csp\
     stringtools.stp\
     task\
+    tcp_socket\
 )
 
 # Put it first so that "make" without argument is like "make help".
diff --git a/tcp_socket b/tcp_socket
new file mode 160000
index 0000000..a34195e
--- /dev/null
+++ b/tcp_socket
@@ -0,0 +1 @@
+Subproject commit a34195edf977fe9e2372df6beb3f915eeb8aabe4