diff --git a/haskell-src/lib/ChainwebData/Env.hs b/haskell-src/lib/ChainwebData/Env.hs
index 258c124e..34fc1dfb 100644
--- a/haskell-src/lib/ChainwebData/Env.hs
+++ b/haskell-src/lib/ChainwebData/Env.hs
@@ -306,7 +306,8 @@ versionReader :: ReadM ChainwebVersion
 versionReader = eitherReader $ \case
   txt | map toLower txt == "mainnet01" || map toLower txt == "mainnet" -> Right "mainnet01"
   txt | map toLower txt == "testnet04" || map toLower txt == "testnet" -> Right "testnet04"
-  txt -> Left $ printf "Can'txt read chainwebversion: got %" txt
+  txt | map toLower txt == "testnet05" -> Right "testnet05"
+  txt -> Left $ printf "Can't read chainwebversion: got %" txt
 
 simpleVersionParser :: Parser ChainwebVersion
 simpleVersionParser =
diff --git a/haskell-src/lib/ChainwebData/Types.hs b/haskell-src/lib/ChainwebData/Types.hs
index 56178f00..09be60bb 100644
--- a/haskell-src/lib/ChainwebData/Types.hs
+++ b/haskell-src/lib/ChainwebData/Types.hs
@@ -124,4 +124,5 @@ withEventsMinHeight version errorMessage action = withVersion version onVersion
       "testnet04" -> Just 1_261_000
       "recap-development" -> Just 14
       "development" -> Just 0
+      "testnet05" -> Just 0
       _ -> Nothing