diff --git a/gemserv.cabal b/gemserv.cabal
index 5833de0..01d6aeb 100644
--- a/gemserv.cabal
+++ b/gemserv.cabal
@@ -29,6 +29,7 @@ library
   ghc-options: -Wall
   build-depends:
       base >=4.7 && <5
+    , tcp-streams >=1.0.1.1 && <1.1
   default-language: Haskell2010
 
 test-suite gemserv-test
@@ -43,4 +44,5 @@ test-suite gemserv-test
       base >=4.7 && <5
     , gemserv
     , hspec >=2.7.10 && <2.8
+    , tcp-streams >=1.0.1.1 && <1.1
   default-language: Haskell2010
diff --git a/package.yaml b/package.yaml
index 8399cba..80c02c1 100644
--- a/package.yaml
+++ b/package.yaml
@@ -23,6 +23,7 @@ ghc-options:
 
 dependencies:
 - base >= 4.7 && < 5
+- tcp-streams >= 1.0.1.1 && < 1.1
 
 library:
   source-dirs: src
diff --git a/stack.yaml b/stack.yaml
index 21ac023..34bb3ec 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -40,7 +40,8 @@ packages:
 # - git: https://github.com/commercialhaskell/stack.git
 #   commit: e7b331f14bcffb8367cd58fbfc8b40ec7642100a
 #
-# extra-deps: []
+extra-deps:
+- tcp-streams-1.0.1.1@sha256:35e9ecfa515797052f8c3c01834d2daebd5e93f3152c7fc98b32652bf6f0c052,2329
 
 # Override default flag values for local packages and extra-deps
 # flags: {}
diff --git a/stack.yaml.lock b/stack.yaml.lock
index 659abd6..402ea50 100644
--- a/stack.yaml.lock
+++ b/stack.yaml.lock
@@ -3,7 +3,14 @@
 # For more information, please see the documentation at:
 #   https://docs.haskellstack.org/en/stable/lock_files
 
-packages: []
+packages:
+- completed:
+    hackage: tcp-streams-1.0.1.1@sha256:35e9ecfa515797052f8c3c01834d2daebd5e93f3152c7fc98b32652bf6f0c052,2329
+    pantry-tree:
+      size: 1004
+      sha256: 572071fca40a0b6c4cc950d10277a6f12e83cf4846882b6ef83fcccaa2c18c45
+  original:
+    hackage: tcp-streams-1.0.1.1@sha256:35e9ecfa515797052f8c3c01834d2daebd5e93f3152c7fc98b32652bf6f0c052,2329
 snapshots:
 - completed:
     size: 586268