diff --git a/code/week04/cabal.project b/code/week04/cabal.project
index 0ecddd9..3c020b7 100644
--- a/code/week04/cabal.project
+++ b/code/week04/cabal.project
@@ -25,7 +25,7 @@ source-repository-package
     prettyprinter-configurable
     quickcheck-dynamic
     word-array
-  tag: 72bafd845cb39cf08c24d063503b83e2ee5aa5cc
+  tag: 2fbb7abb22138a434bb6c4f663a81e9b9dc51e98
 
 -- The following sections are copied from the 'plutus' repository cabal.project at the revision
 -- given above.
diff --git a/code/week04/src/Week04/Contract.hs b/code/week04/src/Week04/Contract.hs
index 5566b49..a729356 100644
--- a/code/week04/src/Week04/Contract.hs
+++ b/code/week04/src/Week04/Contract.hs
@@ -19,7 +19,7 @@ import Wallet.Emulator.Wallet
 myContract1 :: Contract () Empty Text ()
 myContract1 = do
     void $ Contract.throwError "BOOM!"
-    Contract.logInfo @String "Hello from the contract!"
+    Contract.logInfo @String "hello from the contract"
 
 myTrace1 :: EmulatorTrace ()
 myTrace1 = void $ activateContractWallet (Wallet 1) myContract1
@@ -29,7 +29,7 @@ test1 = runEmulatorTraceIO myTrace1
 
 myContract2 :: Contract () Empty Void ()
 myContract2 = Contract.handleError
-    (\err -> Contract.logError $ "Caught error: " ++ unpack err)
+    (\err -> Contract.logError $ "caught: " ++ unpack err)
     myContract1
 
 myTrace2 :: EmulatorTrace ()
@@ -38,17 +38,20 @@ myTrace2 = void $ activateContractWallet (Wallet 1) myContract2
 test2 :: IO ()
 test2 = runEmulatorTraceIO myTrace2
 
-type MySchema = Endpoint "foo" Int
+type MySchema = Endpoint "foo" Int .\/ Endpoint "bar" String
 
 myContract3 :: Contract () MySchema Text ()
 myContract3 = do
     n <- endpoint @"foo"
     Contract.logInfo n
+    s <- endpoint @"bar"
+    Contract.logInfo s
 
 myTrace3 :: EmulatorTrace ()
 myTrace3 = do
     h <- activateContractWallet (Wallet 1) myContract3
     callEndpoint @"foo" h 42
+    callEndpoint @"bar" h "Haskell"
 
 test3 :: IO ()
 test3 = runEmulatorTraceIO myTrace3
diff --git a/code/week04/src/Week04/Solution.hs b/code/week04/src/Week04/Solution.hs
index 5594401..7ba6f0d 100644
--- a/code/week04/src/Week04/Solution.hs
+++ b/code/week04/src/Week04/Solution.hs
@@ -35,13 +35,14 @@ payContract = do
 payTrace :: Integer -> Integer -> EmulatorTrace ()
 payTrace x y = do
     h <- activateContractWallet (Wallet 1) payContract
+    let pkh = pubKeyHash $ walletPubKey $ Wallet 2
     callEndpoint @"pay" h $ PayParams
-        { ppRecipient = pubKeyHash $ walletPubKey $ Wallet 2
+        { ppRecipient = pkh
         , ppLovelace  = x
         }
     void $ Emulator.waitNSlots 1
     callEndpoint @"pay" h $ PayParams
-        { ppRecipient = pubKeyHash $ walletPubKey $ Wallet 2
+        { ppRecipient = pkh
         , ppLovelace  = y
         }
     void $ Emulator.waitNSlots 1
diff --git a/code/week04/src/Week04/Trace.hs b/code/week04/src/Week04/Trace.hs
index 9179827..f4442ac 100644
--- a/code/week04/src/Week04/Trace.hs
+++ b/code/week04/src/Week04/Trace.hs
@@ -31,4 +31,4 @@ myTrace = do
     void $ waitUntilSlot 20
     callEndpoint @"grab" h2 ()
     s <- waitNSlots 1
-    Extras.logInfo $ "reached slot " ++ show s
+    Extras.logInfo $ "reached " ++ show s