diff --git a/ihp.cabal b/ihp.cabal
index a4f2a275d..e4931b21c 100644
--- a/ihp.cabal
+++ b/ihp.cabal
@@ -85,6 +85,7 @@ common shared-properties
             , cryptohash
             , base16-bytestring
             , deepseq
+            , parser-combinators
     default-extensions:
         OverloadedStrings
         , NoImplicitPrelude
diff --git a/ihp.nix b/ihp.nix
index 81171c9ef..854a7f3da 100644
--- a/ihp.nix
+++ b/ihp.nix
@@ -51,6 +51,7 @@
 , resource-pool
 , wreq
 , deepseq
+, parser-combinators
 }:
 mkDerivation {
   pname = "ihp";
@@ -108,6 +109,7 @@ mkDerivation {
     wreq
     deepseq
     uri-encode
+    parser-combinators
   ];
   license = stdenv.lib.licenses.mit;
   postInstall = ''