diff --git a/README.md b/README.md
index 1060d55..c24b60a 100644
--- a/README.md
+++ b/README.md
@@ -24,5 +24,5 @@
 ## Development
 Clond sources to directory and use `stack` for running tests:
 ```
-stack && stack test
+stack build && stack test
 ```
diff --git a/src/Language/Wasm/Structure.hs b/src/Language/Wasm/Structure.hs
index 9d5877b..44c659a 100644
--- a/src/Language/Wasm/Structure.hs
+++ b/src/Language/Wasm/Structure.hs
@@ -30,11 +30,16 @@ module Language.Wasm.Structure (
     GlobalType(..),
     FuncType(..),
     ValueType(..),
+    ParamsType,
     ResultType,
     Expression,
     LabelIndex,
+    FuncIndex,
+    TypeIndex,
     LocalIndex,
     GlobalIndex,
+    MemoryIndex,
+    TableIndex,
     emptyModule,
     isFuncImport,
     isTableImport,