diff --git a/.travis.yml b/.travis.yml
index 1bf1064..7537b21 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -84,13 +84,6 @@ addons:
 matrix:
   allow_failures:
     - env: PLATFORM="native_dyn" DESKTOP_ONLY=1
-    - env: PLATFORM="android_arm"
-    - env: PLATFORM="android_arm64"
-    - env: PLATFORM="android_mips"
-    - env: PLATFORM="android_mips64"
-    - env: PLATFORM="android_x86"
-    - env: PLATFORM="android_x86_64"
-    - env: PLATFORM="android"
   include:
     - env: PLATFORM="native_dyn" DESKTOP_ONLY=1
       addons:
diff --git a/kiwixbuild/dependencies/android_sdk.py b/kiwixbuild/dependencies/android_sdk.py
index d09f433..39c1a9e 100644
--- a/kiwixbuild/dependencies/android_sdk.py
+++ b/kiwixbuild/dependencies/android_sdk.py
@@ -27,16 +27,15 @@ class android_sdk(Dependency):
             shutil.copytree(self.source_path, tools_dir)
             script = pj(tools_dir, 'android')
             command = '{script} --verbose update sdk -a --no-ui --filter {packages}'
+            packages = [
+                'tools','platform-tools',
+                'build-tools-28.0.3', 'build-tools-27.0.3',
+                'android-28', 'android-27'
+            ]
             command = command.format(
                 script=script,
-                packages = ','.join(str(i) for i in [1,2,8,34,162])
+                packages = ','.join(packages)
             )
-            # packages correspond to :
-            # - 1 : Android SDK Tools, revision 25.2.5
-            # - 2 : Android SDK Platform-tools, revision 25.0.3
-            # - 8 : Android SDK Build-tools, revision 24.0.1
-            # - 34 : SDK Platform Android 7.0, API 24, revision 2
-            # - 162 : Android Support Repository, revision 44
             run_command(command, self.install_path, context, input="y\n")
 
         def _fix_licenses(self, context):
diff --git a/kiwixbuild/dependencies/gradle.py b/kiwixbuild/dependencies/gradle.py
index e62c464..ab53540 100644
--- a/kiwixbuild/dependencies/gradle.py
+++ b/kiwixbuild/dependencies/gradle.py
@@ -10,9 +10,9 @@ class Gradle(Dependency):
     name = "gradle"
 
     class Source(ReleaseDownload):
-        archive = Remotefile('gradle-4.6-bin.zip',
-                             '98bd5fd2b30e070517e03c51cbb32beee3e2ee1a84003a5a5d748996d4b1b915',
-                             'https://services.gradle.org/distributions/gradle-4.6-bin.zip')
+        archive = Remotefile('gradle-5.1.1-bin.zip',
+                             '4953323605c5d7b89e97d0dc7779e275bccedefcdac090aec123375eae0cc798',
+                             'https://services.gradle.org/distributions/gradle-5.1.1-bin.zip')
 
     class Builder(BaseBuilder):
         @property
diff --git a/kiwixbuild/versions.py b/kiwixbuild/versions.py
index efd9454..89358e7 100644
--- a/kiwixbuild/versions.py
+++ b/kiwixbuild/versions.py
@@ -35,7 +35,7 @@ release_versions = {
 
 # This is the "version" of the whole base_deps_versions dict.
 # Change this when you change base_deps_versions.
-base_deps_meta_version = '14'
+base_deps_meta_version = '15'
 
 
 base_deps_versions = {
diff --git a/travis/compile_all.py b/travis/compile_all.py
index 487f947..1ac6b4b 100755
--- a/travis/compile_all.py
+++ b/travis/compile_all.py
@@ -8,7 +8,7 @@ from datetime import date
 import tarfile, zipfile
 import subprocess
 import re
-from urllib.request import urlretrieve
+from urllib.request import urlopen
 from urllib.error import URLError
 
 from kiwixbuild.versions import (
@@ -252,6 +252,19 @@ for p in (NIGHTLY_KIWIX_ARCHIVES_DIR,
 
 make_release = re.fullmatch(r"[0-9]+\.[0-9]+\.[0-9]+", environ.get('TRAVIS_TAG', '')) is not None
 
+def download_base_archive(base_name):
+    url = 'http://tmp.kiwix.org/ci/{}'.format(base_name)
+    file_path = str(HOME/base_name)
+    batch_size = 1024*1024*8
+    with urlopen(url) as resource, open(file_path, 'wb') as file:
+        while True:
+            batch = resource.read(batch_size)
+            if not batch:
+                break
+            print(".", end="")
+            file.write(batch)
+    return file_path
+
 if PLATFORM != 'flatpak':
     # The first thing we need to do is to (potentially) download already compiled base dependencies.
     base_dep_archive_name = "base_deps_{os}_{platform}_{version}.tar.gz".format(
@@ -261,8 +274,7 @@ if PLATFORM != 'flatpak':
 
     print_message("Getting archive {}", base_dep_archive_name)
     try:
-        local_filename, _ = urlretrieve(
-            'http://tmp.kiwix.org/ci/{}'.format(base_dep_archive_name))
+        local_filename = download_base_archive(base_dep_archive_name)
         with tarfile.open(local_filename) as f:
             f.extractall(str(HOME))
     except URLError:
@@ -275,8 +287,7 @@ if PLATFORM != 'flatpak':
                     version=base_deps_meta_version)
                 print_message("Getting archive {}", archive_name)
                 try:
-                    local_filename, _ = urlretrieve(
-                        'http://tmp.kiwix.org/ci/{}'.format(archive_name))
+                    local_filename = download_base_archive(archive_name)
                     with tarfile.open(local_filename) as f:
                         f.extractall(str(HOME))
                 except URLError: