diff --git a/.github/workflows/cpp-macos.yml b/.github/workflows/cpp-macos.yml
index 4062d45..5701029 100644
--- a/.github/workflows/cpp-macos.yml
+++ b/.github/workflows/cpp-macos.yml
@@ -9,6 +9,9 @@ on: # yamllint disable-line rule:truthy
     branches: ["main"]
   workflow_dispatch:
 
+env:
+  VCPKG_VERSION: 2026.07.29
+
 jobs:
   test:
     name: C/C++ CMake CI Test
@@ -29,7 +32,7 @@ jobs:
       - name: Install
         shell: bash
         run: |
-          export VCPKG_VERSION=2025.02.14
+          export VCPKG_VERSION=${VCPKG_VERSION}
           git clone \
             --depth 1 \
             --branch $VCPKG_VERSION \
diff --git a/src/lib/exercises/src/hackerrank/warmup/time_conversion.cpp b/src/lib/exercises/src/hackerrank/warmup/time_conversion.cpp
index 09f6fef..797cb9a 100644
--- a/src/lib/exercises/src/hackerrank/warmup/time_conversion.cpp
+++ b/src/lib/exercises/src/hackerrank/warmup/time_conversion.cpp
@@ -35,11 +35,7 @@ std::string timeConversion(const std::string &s) {
     time.push_back(segment);
   }
 
-  std::stringstream hour_str;
-  hour_str << time[0];
-
-  int hour;
-  hour_str >> hour;
+  int hour = std::stoi(time[0]);
 
   if (hour < 0 || hour > 23) {
     throw std::invalid_argument("Invalid hour value: " + std::to_string(hour));
@@ -53,6 +49,8 @@ std::string timeConversion(const std::string &s) {
     hour += 12;
   }
 
+  std::stringstream hour_str;
+
   hour_str.str("");
   hour_str.clear();
 
diff --git a/vcpkg.json b/vcpkg.json
index 666a13b..57523d4 100644
--- a/vcpkg.json
+++ b/vcpkg.json
@@ -2,5 +2,6 @@
   "dependencies": [
     "catch2",
     "nlohmann-json"
-  ]
+  ],
+  "builtin-baseline": "dd3097e305afa53f7b4312371f62058d2e665320"
 }