diff --git a/.github/workflows/package-tools.yml b/.github/workflows/package-tools.yml
index 57fcb94..61af258 100644
--- a/.github/workflows/package-tools.yml
+++ b/.github/workflows/package-tools.yml
@@ -11,8 +11,8 @@ jobs:
       matrix:
         os: ["ubuntu-20.04", "windows-2019", "macos-10.15"]
     steps:
-    - uses: actions/checkout@v3
-    - uses: actions/setup-python@v4
+    - uses: actions/checkout@v4
+    - uses: actions/setup-python@v5
       with:
         python-version: "3.8"
     - name: "Build & Test"
@@ -33,8 +33,8 @@ jobs:
     if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags')
     needs: bincrafters-package-tools-test
     steps:
-    - uses: actions/checkout@v3
-    - uses: actions/setup-python@v4
+    - uses: actions/checkout@v4
+    - uses: actions/setup-python@v5
       with:
         python-version: "3.8"
     - name: Build
diff --git a/bincrafters/__init__.py b/bincrafters/__init__.py
index e3d0b7b..e00d1f5 100644
--- a/bincrafters/__init__.py
+++ b/bincrafters/__init__.py
@@ -1 +1 @@
-__version__ = '0.33.0'
+__version__ = '1.0.0-alpha1'
diff --git a/bincrafters/generate_ci_jobs.py b/bincrafters/generate_ci_jobs.py
index f00a4cf..9bfa330 100644
--- a/bincrafters/generate_ci_jobs.py
+++ b/bincrafters/generate_ci_jobs.py
@@ -61,40 +61,33 @@ def _get_base_config(recipe_directory: str, platform: str, split_by_build_types:
         run_windows = _run_windows_jobs_on_gha()
         if recipe_type == "installer":
             matrix["config"] = [
-                {"name": "Installer Linux", "compiler": "GCC", "version": "7", "os": "ubuntu-18.04", "dockerImage": "conanio/gcc7"},
+                {"name": "Installer Linux", "compiler": "GCC", "version": "7", "os": "ubuntu-20.04", "dockerImage": "conanio/gcc7"},
                 {"name": "Installer Windows", "compiler": "VISUAL", "version": "16", "os": "windows-2019"},
                 {"name": "Installer macOS", "compiler": "APPLE_CLANG", "version": "11.0", "os": "macos-10.15"}
             ]
             matrix_minimal["config"] = matrix["config"].copy()
         elif recipe_type == "unconditional_header_only":
             matrix["config"] = [
-                {"name": "Header-only Linux", "compiler": "CLANG", "version": "8", "os": "ubuntu-18.04"},
+                {"name": "Header-only Linux", "compiler": "CLANG", "version": "8", "os": "ubuntu-20.04"},
                 {"name": "Header-only Windows", "compiler": "VISUAL", "version": "16", "os": "windows-latest"}
             ]
             matrix_minimal["config"] = matrix["config"].copy()
         else:
             matrix["config"] = [
-                {"name": "GCC 4.9", "compiler": "GCC", "version": "4.9", "os": "ubuntu-18.04"},
-                {"name": "GCC 5", "compiler": "GCC", "version": "5", "os": "ubuntu-18.04"},
-                {"name": "GCC 6", "compiler": "GCC", "version": "6", "os": "ubuntu-18.04"},
-                {"name": "GCC 7", "compiler": "GCC", "version": "7", "os": "ubuntu-18.04"},
-                {"name": "GCC 8", "compiler": "GCC", "version": "8", "os": "ubuntu-18.04"},
-                {"name": "GCC 9", "compiler": "GCC", "version": "9", "os": "ubuntu-18.04"},
-                {"name": "GCC 10", "compiler": "GCC", "version": "10", "os": "ubuntu-18.04"},
-                {"name": "GCC 11", "compiler": "GCC", "version": "11", "os": "ubuntu-18.04"},
-                {"name": "CLANG 4.0", "compiler": "CLANG", "version": "4.0", "os": "ubuntu-18.04"},
-                {"name": "CLANG 5.0", "compiler": "CLANG", "version": "5.0", "os": "ubuntu-18.04"},
-                {"name": "CLANG 6.0", "compiler": "CLANG", "version": "6.0", "os": "ubuntu-18.04"},
-                {"name": "CLANG 7.0", "compiler": "CLANG", "version": "7.0", "os": "ubuntu-18.04"},
-                {"name": "CLANG 8", "compiler": "CLANG", "version": "8", "os": "ubuntu-18.04"},
-                {"name": "CLANG 9", "compiler": "CLANG", "version": "9", "os": "ubuntu-18.04"},
-                {"name": "CLANG 10", "compiler": "CLANG", "version": "10", "os": "ubuntu-18.04"},
-                {"name": "CLANG 11", "compiler": "CLANG", "version": "11", "os": "ubuntu-18.04"},
-                {"name": "CLANG 12", "compiler": "CLANG", "version": "12", "os": "ubuntu-18.04"},
+                {"name": "GCC 5", "compiler": "GCC", "version": "5", "os": "ubuntu-20.04"},
+                {"name": "GCC 6", "compiler": "GCC", "version": "6", "os": "ubuntu-20.04"},
+                {"name": "GCC 7", "compiler": "GCC", "version": "7", "os": "ubuntu-20.04"},
+                {"name": "GCC 8", "compiler": "GCC", "version": "8", "os": "ubuntu-20.04"},
+                {"name": "GCC 9", "compiler": "GCC", "version": "9", "os": "ubuntu-20.04"},
+                {"name": "GCC 10", "compiler": "GCC", "version": "10", "os": "ubuntu-20.04"},
+                {"name": "GCC 11", "compiler": "GCC", "version": "11", "os": "ubuntu-20.04"},
+                {"name": "CLANG 10", "compiler": "CLANG", "version": "10", "os": "ubuntu-20.04"},
+                {"name": "CLANG 11", "compiler": "CLANG", "version": "11", "os": "ubuntu-20.04"},
+                {"name": "CLANG 12", "compiler": "CLANG", "version": "12", "os": "ubuntu-20.04"},
+                {"name": "CLANG 13", "compiler": "CLANG", "version": "13", "os": "ubuntu-20.04"},
             ]
             if run_macos:
                 matrix["config"] += [
-                    {"name": "macOS Apple-Clang 10", "compiler": "APPLE_CLANG", "version": "10.0", "os": "macOS-10.15"},
                     {"name": "macOS Apple-Clang 11", "compiler": "APPLE_CLANG", "version": "11.0", "os": "macOS-10.15"},
                     {"name": "macOS Apple-Clang 12", "compiler": "APPLE_CLANG", "version": "11.0", "os": "macOS-10.15"},
                 ]
@@ -104,8 +97,8 @@ def _get_base_config(recipe_directory: str, platform: str, split_by_build_types:
                     # {"name": "Windows VS 2022 - Testing", "compiler": "VISUAL", "version": "17", "os": "windows-2022"},
                 ]
             matrix_minimal["config"] = [
-                {"name": "GCC 7", "compiler": "GCC", "version": "7", "os": "ubuntu-18.04"},
-                {"name": "CLANG 8", "compiler": "CLANG", "version": "8", "os": "ubuntu-18.04"},
+                {"name": "GCC 7", "compiler": "GCC", "version": "7", "os": "ubuntu-20.04"},
+                {"name": "CLANG 10", "compiler": "CLANG", "version": "10", "os": "ubuntu-20.04"},
             ]
             if run_macos:
                 matrix_minimal["config"] += [
@@ -121,7 +114,6 @@ def _get_base_config(recipe_directory: str, platform: str, split_by_build_types:
             matrix_minimal["config"] = []
         else:
             matrix["config"] = [
-                {"name": "macOS Apple-Clang 10", "compiler": "APPLE_CLANG", "version": "10.0", "os": "macOS-10.15"},
                 {"name": "macOS Apple-Clang 11", "compiler": "APPLE_CLANG", "version": "11.0", "os": "macOS-10.15"},
                 {"name": "macOS Apple-Clang 12", "compiler": "APPLE_CLANG", "version": "12.0", "os": "macOS-10.15"},
                 {"name": "Windows VS 2019", "compiler": "VISUAL", "version": "16", "os": "windows-2019"},
diff --git a/bincrafters/prepare_env.py b/bincrafters/prepare_env.py
index 5ffe1f5..4391922 100644
--- a/bincrafters/prepare_env.py
+++ b/bincrafters/prepare_env.py
@@ -57,12 +57,9 @@ def _set_env_variable(var_name: str, value: str):
             version_without_dot = compiler_version.replace(".", "")
             image_suffix = ""
             # Use "modern" CDT containers for newer compilers
-            if (compiler == "GCC" and float(compiler_version) >= 12) or \
-                    (compiler == "CLANG" and float(compiler_version) >= 14):
+            if (compiler == "GCC" and float(compiler_version) >= 11) or \
+                    (compiler == "CLANG" and float(compiler_version) >= 10):
                 image_suffix = "-ubuntu18.04"
-            elif (compiler == "GCC" and float(compiler_version) >= 11) or \
-                    (compiler == "CLANG" and float(compiler_version) >= 12):
-                image_suffix = "-ubuntu16.04"
 
             docker_image = "conanio/{}{}{}".format(compiler_lower, version_without_dot, image_suffix)
         _set_env_variable("CONAN_DOCKER_IMAGE", docker_image)