diff --git a/src/Composer/Repository/Vcs/GitDriver.php b/src/Composer/Repository/Vcs/GitDriver.php
index 499a5a9df..230c24303 100644
--- a/src/Composer/Repository/Vcs/GitDriver.php
+++ b/src/Composer/Repository/Vcs/GitDriver.php
@@ -14,6 +14,7 @@ namespace Composer\Repository\Vcs;
 
 use Composer\Util\ProcessExecutor;
 use Composer\Util\Filesystem;
+use Composer\Util\Url;
 use Composer\Util\Git as GitUtil;
 use Composer\IO\IOInterface;
 use Composer\Cache;
@@ -74,7 +75,7 @@ class GitDriver extends VcsDriver
         $this->getTags();
         $this->getBranches();
 
-        $this->cache = new Cache($this->io, $this->config->get('cache-repo-dir').'/'.preg_replace('{[^a-z0-9.]}i', '-', $cacheUrl));
+        $this->cache = new Cache($this->io, $this->config->get('cache-repo-dir').'/'.preg_replace('{[^a-z0-9.]}i', '-', Url::sanitize($cacheUrl)));
         $this->cache->setReadOnly($this->config->get('cache-read-only'));
     }
 
diff --git a/src/Composer/Repository/Vcs/SvnDriver.php b/src/Composer/Repository/Vcs/SvnDriver.php
index 87c9781b6..56f1dcfc6 100644
--- a/src/Composer/Repository/Vcs/SvnDriver.php
+++ b/src/Composer/Repository/Vcs/SvnDriver.php
@@ -17,6 +17,7 @@ use Composer\Config;
 use Composer\Json\JsonFile;
 use Composer\Util\ProcessExecutor;
 use Composer\Util\Filesystem;
+use Composer\Util\Url;
 use Composer\Util\Svn as SvnUtil;
 use Composer\IO\IOInterface;
 use Composer\Downloader\TransportException;
@@ -77,7 +78,7 @@ class SvnDriver extends VcsDriver
             $this->baseUrl = substr($this->url, 0, $pos);
         }
 
-        $this->cache = new Cache($this->io, $this->config->get('cache-repo-dir').'/'.preg_replace('{[^a-z0-9.]}i', '-', $this->baseUrl));
+        $this->cache = new Cache($this->io, $this->config->get('cache-repo-dir').'/'.preg_replace('{[^a-z0-9.]}i', '-', Url::sanitize($this->baseUrl)));
         $this->cache->setReadOnly($this->config->get('cache-read-only'));
 
         $this->getBranches();