diff --git a/src/core/format/Convert.ts b/src/core/format/Convert.ts
index f6d12097b2..f45b7b9eac 100644
--- a/src/core/format/Convert.ts
+++ b/src/core/format/Convert.ts
@@ -168,7 +168,7 @@ export class Convert {
         const rawString = Convert.rstr2utf8(input);
         let result = '';
         for (let i = 0; i < rawString.length; i++) {
-            result += rawString.charCodeAt(i).toString(16);
+            result += rawString.charCodeAt(i).toString(16).padStart(2, '0');
         }
         return result;
     }
diff --git a/src/core/format/Utilities.ts b/src/core/format/Utilities.ts
index fe0fc1b401..90a2180655 100644
--- a/src/core/format/Utilities.ts
+++ b/src/core/format/Utilities.ts
@@ -133,7 +133,7 @@ export const split = (name, processor) => {
 
 export const generateNamespaceId = (parentId, name) => {
     const hash = sha3_256.create();
-    hash.update(Uint32Array.from(parentId).buffer);
+    hash.update(Uint32Array.from(parentId).buffer as any);
     hash.update(name);
     const result = new Uint32Array(hash.arrayBuffer());
     // right zero-filling required to keep unsigned number representation
diff --git a/test/core/format/Convert.spec.ts b/test/core/format/Convert.spec.ts
index d40aa5b8b0..7ed27007fa 100644
--- a/test/core/format/Convert.spec.ts
+++ b/test/core/format/Convert.spec.ts
@@ -233,6 +233,14 @@ describe('convert', () => {
             // Assert:
             expect(actual).to.equal('e58588e7a7a6e585a9e6bca2');
         });
+
+        it('utf8 text to hex with control char', () => {
+            // Act:
+            const actual = convert.utf8ToHex(String.fromCodePoint(0x0f) + ' Hello World!');
+
+            // Assert:
+            expect(actual).to.equal('0f2048656c6c6f20576f726c6421');
+        });
     });
 
     describe('signed <-> unsigned byte', () => {
diff --git a/test/core/format/IdGenerator.spec.ts b/test/core/format/IdGenerator.spec.ts
index 32921fd12b..f81cbc14c4 100644
--- a/test/core/format/IdGenerator.spec.ts
+++ b/test/core/format/IdGenerator.spec.ts
@@ -143,7 +143,7 @@ const mosaicTestVector = {
 describe('id generator', () => {
     function generateNamespaceId(parentId, name) {
         const hash = sha3_256.create();
-        hash.update(Uint32Array.from(parentId).buffer);
+        hash.update(Uint32Array.from(parentId).buffer as any);
         hash.update(name);
         const result = new Uint32Array(hash.arrayBuffer());
         // right zero-filling required to keep unsigned number representation
diff --git a/tsconfig.json b/tsconfig.json
index b2de510219..4059e92227 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -13,7 +13,7 @@
     "outDir": "dist",
     "allowJs": false,
     "lib": [
-      "es2016",
+      "es2017",
       "dom"
     ],
     "typeRoots": [