diff --git a/.azure-pipelines/azure-pipelines-linux-clang.yml b/.azure-pipelines/azure-pipelines-linux-clang.yml
index 7d61252..533408d 100644
--- a/.azure-pipelines/azure-pipelines-linux-clang.yml
+++ b/.azure-pipelines/azure-pipelines-linux-clang.yml
@@ -2,10 +2,6 @@ jobs:
   - job: 'Linux_0'
     strategy:
       matrix:
-        clang_4:
-          llvm_version: '4.0'
-        clang_5:
-          llvm_version: '5.0'
         clang_6:
           llvm_version: '6.0'
         clang_7:
@@ -17,7 +13,7 @@ jobs:
         clang_10:
           llvm_version: '10'
     pool:
-      vmImage: ubuntu-16.04
+      vmImage: ubuntu-18.04
     variables:
       CC: clang-$(llvm_version)
       CXX: clang++-$(llvm_version)
diff --git a/.azure-pipelines/azure-pipelines-linux-gcc.yml b/.azure-pipelines/azure-pipelines-linux-gcc.yml
index bf18b99..d339f5c 100644
--- a/.azure-pipelines/azure-pipelines-linux-gcc.yml
+++ b/.azure-pipelines/azure-pipelines-linux-gcc.yml
@@ -2,10 +2,6 @@ jobs:
   - job: 'Linux_1'
     strategy:
       matrix:
-        gcc_4:
-          gcc_version: '4.9'
-        gcc_5:
-          gcc_version: '5'
         gcc_6:
           gcc_version: '6'
         gcc_7:
@@ -15,7 +11,7 @@ jobs:
         gcc_9:
           gcc_version: '9'
     pool:
-      vmImage: ubuntu-16.04
+      vmImage: ubuntu-18.04
     variables:
       CC: gcc-$(gcc_version)
       CXX: g++-$(gcc_version)
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 84a6b66..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,112 +0,0 @@
-language: cpp
-dist: xenial
-matrix:
-  include:
-    - os: linux
-      addons:
-        apt:
-          sources:
-            - ubuntu-toolchain-r-test
-          packages:
-            - g++-4.9
-      env: COMPILER=gcc GCC=4.9
-    - os: linux
-      addons:
-        apt:
-          sources:
-            - ubuntu-toolchain-r-test
-          packages:
-            - g++-5
-      env: COMPILER=gcc GCC=5
-    - os: linux
-      addons:
-        apt:
-          sources:
-            - ubuntu-toolchain-r-test
-          packages:
-            - g++-6
-      env: COMPILER=gcc GCC=6
-    - os: linux
-      addons:
-        apt:
-          sources:
-            - ubuntu-toolchain-r-test
-          packages:
-            - g++-7
-      env: COMPILER=gcc GCC=7
-    - os: linux
-      addons:
-        apt:
-          sources:
-            - ubuntu-toolchain-r-test
-            - llvm-toolchain-xenial-4.0
-          packages:
-            - g++-4.9
-            - clang-4.0
-      env: COMPILER=clang CLANG=4.0
-    - os: linux
-      addons:
-        apt:
-          sources:
-            - ubuntu-toolchain-r-test
-            - llvm-toolchain-xenial-5.0
-          packages:
-            - g++-4.9
-            - clang-5.0
-      env: COMPILER=clang CLANG=5.0
-    - os: linux
-      addons:
-        apt:
-          sources:
-            - ubuntu-toolchain-r-test
-            - llvm-toolchain-xenial-6.0
-          packages:
-            - clang-6.0
-      env: COMPILER=clang CLANG=6.0
-    - os: osx
-      osx_image: xcode8
-      compiler: clang
-env:
-  global:
-    - MINCONDA_VERSION="latest"
-    - MINCONDA_LINUX="Linux-x86_64"
-    - MINCONDA_OSX="MacOSX-x86_64"
-before_install:
-    - |
-      # Configure build variables
-      if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then
-        if [[ "$COMPILER" == "gcc" ]]; then
-          export CXX=g++-$GCC CC=gcc-$GCC;
-        fi
-        if [[ "$COMPILER" == "clang" ]]; then
-          export CXX=clang++-$CLANG CC=clang-$CLANG;
-        fi
-      elif [[ "$TRAVIS_OS_NAME" == "osx" ]]; then
-        export CXX=clang++ CC=clang;
-      fi
-install:
-    # Define the version of miniconda to download
-    - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then
-        MINCONDA_OS=$MINCONDA_LINUX;
-      elif [[ "$TRAVIS_OS_NAME" == "osx" ]]; then
-        MINCONDA_OS=$MINCONDA_OSX;
-      fi
-    - wget "http://repo.continuum.io/miniconda/Miniconda3-$MINCONDA_VERSION-$MINCONDA_OS.sh" -O miniconda.sh;
-    - bash miniconda.sh -b -p $HOME/miniconda
-    - export PATH="$HOME/miniconda/bin:$PATH"
-    - hash -r
-    - conda config --set always_yes yes --set changeps1 no
-    # The 2 following lines are a workaround to https://github.com/conda/conda/issues/9337
-    - pip uninstall -y setuptools
-    - conda install setuptools
-    - conda update -q conda
-    - conda install cmake -c conda-forge
-    - conda install xtensor=0.21.4 -c conda-forge
-    # Testing
-    - mkdir build
-    - cd build
-    - cmake -DDOWNLOAD_GTEST=ON ..;
-    - make -j2 test_xframe
-    - cd test
-script:
-    - ./test_xframe
diff --git a/README.md b/README.md
index f1ff101..0b8f343 100644
--- a/README.md
+++ b/README.md
@@ -32,7 +32,7 @@ mamba install -c conda-forge xtensor
 
 |  xframe  |  xtensor  |
 |----------|-----------|
-|  master  |  ^0.21.4  |
+|  master  |  ^0.24.0  |
 |   0.3.0  |  ^0.21.4  |
 |   0.2.0  |  ^0.20.0  |
 |   0.1.0  |  ^0.19.1  |
diff --git a/environment-dev.yml b/environment-dev.yml
index 234c03b..440b3af 100644
--- a/environment-dev.yml
+++ b/environment-dev.yml
@@ -3,5 +3,5 @@ channels:
   - conda-forge
 dependencies:
   - cmake
-  - xtensor=0.21.4
+  - xtensor=0.25.0