diff --git a/e2e/assets/counter_idl/counter_idl.mo b/e2e/assets/counter_idl/counter_idl.mo
index 994f8281a2..09fd7ab061 100644
--- a/e2e/assets/counter_idl/counter_idl.mo
+++ b/e2e/assets/counter_idl/counter_idl.mo
@@ -1,17 +1,18 @@
 import A "mo:base/Array";
-import Prim "mo:prim";
+import C "mo:base/Char";
+import T "mo:base/Text";
 
 actor {
     public type List<T> = ?{head : T; tail : List<T>};
     public type List2<T> = { #nil; #cons: (T, List2<T>) };
-    
-    func map(l: List<Int>) : List<Int> = {
+
+    func map(l: List<Int>) : List<Int> {
         switch l {
           case null { null };
           case (?v) { ?{head=v.head+1; tail=map(v.tail)} };
         }
     };
-    func map2(l: List2<Int>) : List2<Int> = {
+    func map2(l: List2<Int>) : List2<Int> {
          switch l {
            case (#nil) { #nil };
            case (#cons(h, tl)) { #cons(h+1, map2 tl) };
@@ -26,8 +27,8 @@ actor {
 
         var text = "";
         for (c in str.chars()) {
-            let c2 = Prim.word32ToChar(Prim.charToWord32(c)+1);
-            text := text # Prim.charToText(c2);
+            let c2 = C.fromNat32(C.toNat32(c)+1);
+            text := text # T.fromChar(c2);
         };
         return (i+1, not b, text, arr, map(l), map2(l2));
     };
diff --git a/e2e/assets/identity/identity.mo b/e2e/assets/identity/identity.mo
index 214ec94349..375f46c30a 100644
--- a/e2e/assets/identity/identity.mo
+++ b/e2e/assets/identity/identity.mo
@@ -1,6 +1,6 @@
 import P "mo:base/Principal";
 
-shared {caller} actor class () = Self {
+shared({caller}) actor class () = Self {
     private let initializer : Principal = caller;
 
     public shared(msg) func fromCall(): async Principal {
diff --git a/nix/sources.json b/nix/sources.json
index 6df924d2c5..85b8345e70 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -46,7 +46,7 @@
     "motoko": {
         "branch": "release",
         "repo": "ssh://git@github.com/dfinity/motoko",
-        "rev": "85651c6b2d118cc068c4263f6fe548a85e805861",
+        "rev": "7a2a0e456ae0f18865cd8ab6b4a3d77863ce578f",
         "tag": "0.5.10",
         "type": "git"
     },