diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index f8fc89e..eb1aa18 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -13,7 +13,7 @@ jobs:
       - name: Install Nargo
         uses: noir-lang/noirup@v0.1.3
         with:
-          toolchain: 0.19.2
+          toolchain: 0.19.4
 
       - name: Run nargo test
         run: |
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 85abd90..773530b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [0.1.2](https://github.com/zkworks-xyz/noir-base64/commits/v0.1.2...v0.1.0) (2024-01-03)
+
+
+### Changes
+
+* adjust to left shift operation changes in Noir version `0.19.3` - change `std::wrapping_shift_left` to `<<` ([#11](https://github.com/zkworks-xyz/noir-base64/issues/11))
+
 ## [0.1.1](https://github.com/zkworks-xyz/noir-base64/commits/v0.1.1) (2023-11-28)
 
 
diff --git a/Nargo.toml b/Nargo.toml
index 70ae063..c2b25d1 100644
--- a/Nargo.toml
+++ b/Nargo.toml
@@ -2,6 +2,6 @@
 name = "base64"
 type = "lib"
 authors = [""]
-compiler_version = ">=0.19.2"
+compiler_version = ">=0.19.4"
 
 [dependencies]
diff --git a/src/lib.nr b/src/lib.nr
index fb90ca2..9451083 100644
--- a/src/lib.nr
+++ b/src/lib.nr
@@ -46,20 +46,20 @@ fn convert_chunk<N>(input: [u8; N], url_safe: bool) -> [u8; 4] {
     let mut result = [64; 4];
 
     let input0_first6 = input[0] >> 2;
-    let input0_last2 = std::wrapping_shift_left(input[0], 6) >> 2;
+    let input0_last2 = (input[0] << 6) >> 2;
 
     result[0] = input0_first6;
     result[1] = input0_last2;
     if input_len > 1 {
         let input1_first4 = input[1] >> 4;
-        let input1_last4 = std::wrapping_shift_left(input[1], 4) >> 2;
+        let input1_last4 = (input[1] << 4) >> 2;
 
         result[1] += input1_first4;
         result[2] = input1_last4;
 
         if input_len > 2 {
             let input2_first2 = input[2] >> 6;
-            let input2_last6 = std::wrapping_shift_left(input[2], 2) >> 2;
+            let input2_last6 = (input[2] << 2) >> 2;
 
             result[2] += input2_first2;
             result[3] = input2_last6;