diff --git a/.travis.yml b/.travis.yml
index e9b4f11..cea58e3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,7 +8,7 @@ env:
   global:
       - REPO_DIR=pandas
       # on release change this to a version
-      - BUILD_COMMIT="v1.4.4"
+      - BUILD_COMMIT="v1.5.0rc0"
       - UNICODE_WIDTH=32
       - PLAT=aarch64
       - NP_BUILD_DEP="numpy==1.17.3"
@@ -39,6 +39,13 @@ jobs:
         - NP_TEST_DEP="numpy==1.21.2"
         # Xenial is EOL and the pip there doesn't support python 3.10
         - DOCKER_TEST_IMAGE="multibuild/focal_arm64v8"
+    - os: linux
+      env:
+        - MB_PYTHON_VERSION="3.11"
+        - NP_BUILD_DEP="numpy==1.23.2"
+        - NP_TEST_DEP="numpy==1.23.2"
+        # Xenial is EOL and the pip there doesn't support python 3.10
+        - DOCKER_TEST_IMAGE="multibuild/focal_arm64v8"
 before_install:
     # See:
     # https://github.com/travis-ci/travis-ci/issues/8920#issuecomment-352661024
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 600cc66..13315be 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -44,6 +44,11 @@ jobs:
           PYTHON_ARCH: "x64"
           NP_BUILD_DEP: "1.21.3"
           NIGHTLY_BUILD: "true"
+        py_3.11_64:
+          PYTHON_VERSION: "3.11-dev"
+          PYTHON_ARCH: "x64"
+          NP_BUILD_DEP: "1.23.2"
+          NIGHTLY_BUILD: "true"
 
   - template: azure/posix.yml
     parameters:
@@ -66,7 +71,12 @@ jobs:
           NP_BUILD_DEP: "numpy==1.21.2"
           DOCKER_TEST_IMAGE: "multibuild/focal_{PLAT}"
           NIGHTLY_BUILD: "true"
-
+        py_3.11_64:
+          MB_PYTHON_VERSION: "3.11"
+          MB_ML_VER: "2014"
+          NP_BUILD_DEP: "numpy==1.23.2"
+          DOCKER_TEST_IMAGE: "multibuild/focal_{PLAT}"
+          NIGHTLY_BUILD: "true"
 
   - template: azure/posix.yml
     parameters:
@@ -101,3 +111,15 @@ jobs:
           PLAT: universal2
           NP_BUILD_DEP: "numpy==1.21.3"
           NIGHTLY_BUILD: "true"
+        py_3.11_64:
+          MB_PYTHON_VERSION: "3.11-dev"
+          PLAT: "x86_64"
+          NP_BUILD_DEP: "numpy==1.23.2"
+          NIGHTLY_BUILD: "true"
+          MB_PYTHON_OSX_VER: 10.9
+        py_3.11_universal2:
+          MB_PYTHON_VERSION: "3.11-dev"
+          PLAT: universal2
+          NP_BUILD_DEP: "numpy==1.23.2"
+          NIGHTLY_BUILD: "true"
+          MB_PYTHON_OSX_VER: 10.9
diff --git a/azure/posix.yml b/azure/posix.yml
index 82a1d60..f82e58a 100644
--- a/azure/posix.yml
+++ b/azure/posix.yml
@@ -9,7 +9,7 @@ jobs:
       vmImage: ${{ parameters.vmImage }}
     variables:
       REPO_DIR: "pandas"
-      BUILD_COMMIT: "v1.4.4"
+      BUILD_COMMIT: "v1.5.0rc0"
       PLAT: "x86_64"
       NP_BUILD_DEP: "numpy==1.17.3"
       CYTHON_BUILD_DEP: "cython==0.29.32"
@@ -28,7 +28,9 @@ jobs:
       - task: UsePythonVersion@0
         inputs:
           versionSpec: $(MB_PYTHON_VERSION)
+          allowUnstable: true
         displayName: Set python version
+        condition: not(eq(variables['MB_PYTHON_VERSION'], '3.11'))
 
       - bash: |
           set -e
diff --git a/azure/windows.yml b/azure/windows.yml
index b827991..372c166 100644
--- a/azure/windows.yml
+++ b/azure/windows.yml
@@ -8,7 +8,7 @@ jobs:
     pool:
       vmImage: ${{ parameters.vmImage }}
     variables:
-      BUILD_COMMIT: "v1.4.4"
+      BUILD_COMMIT: "v1.5.0rc0"
       NP_BUILD_DEP: "1.17.3"
       CYTHON_BUILD_DEP: "0.29.32"
       NIGHTLY_BUILD_COMMIT: "main"
@@ -27,6 +27,7 @@ jobs:
         inputs:
           versionSpec: $(PYTHON_VERSION)
           architecture: $(PYTHON_ARCH)
+          allowUnstable: true
         displayName: Set python version
 
       - bash: |
@@ -91,9 +92,20 @@ jobs:
         displayName: Install wheel and test
         condition: eq(variables['SKIP_BUILD'], 'false')
 
+      - bash: |
+          if [[ $PYTHON_VERSION == *"-dev"* ]]; then
+            stripped_ver=$(echo $PYTHON_VERSION | sed -e "s/dev/rc/g")
+            echo $stripped_ver
+            echo "##vso[task.setvariable variable=STRIPPED_PYTHON_VERSION]$stripped_ver"
+          else
+            echo "##vso[task.setvariable variable=STRIPPED_PYTHON_VERSION]$PYTHON_VERSION"
+          fi
+        displayName: Strip dev postfix from PYTHON_VERSION for pre-releases
+        condition: eq(variables['SKIP_BUILD'], 'false')
+
       - script: |
-          docker pull python:$(PYTHON_VERSION)-windowsservercore
-          docker run -v %cd%:c:\pandas python:$(PYTHON_VERSION)-windowsservercore /pandas/check_windows_dlls.bat
+          docker pull python:$(STRIPPED_PYTHON_VERSION)-windowsservercore
+          docker run -v %cd%:c:\pandas python:$(STRIPPED_PYTHON_VERSION)-windowsservercore /pandas/check_windows_dlls.bat
         displayName: Ensure wheel imports correctly
         # No Windows images for x86
         condition: and(eq(variables['SKIP_BUILD'], 'false'), eq(variables['PYTHON_ARCH'], 'x64'))
diff --git a/multibuild b/multibuild
index 041625d..85467f2 160000
--- a/multibuild
+++ b/multibuild
@@ -1 +1 @@
-Subproject commit 041625d47880e11ae3d2333874027e749b35fa72
+Subproject commit 85467f2c27ce82519ba763932e0d94d1b43edbf5