diff --git a/CHANGELOG.md b/CHANGELOG.md
index 19ed39736b..9d67ea618c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,7 @@
 # Changelog
 
+## Unreleased
+
 ## 1.8.0 - 2019-03-15
 ### Added
 - Support for:
diff --git a/gallery_dl/extractor/tumblr.py b/gallery_dl/extractor/tumblr.py
index 34b75d2af2..541b981f58 100644
--- a/gallery_dl/extractor/tumblr.py
+++ b/gallery_dl/extractor/tumblr.py
@@ -334,6 +334,9 @@ def info(self, blog):
 
     def avatar(self, blog, size="512"):
         """Retrieve a blog avatar"""
+        if self.api_key:
+            url_fmt = "https://api.tumblr.com/v2/blog/{}/avatar/{}?api_key={}"
+            return url_fmt.format(blog, size, self.api_key)
         params = {"size": size}
         data = self._call(blog, "avatar", params, allow_redirects=False)
         return data["avatar_url"]
diff --git a/gallery_dl/version.py b/gallery_dl/version.py
index 65ed479b08..84e317f020 100644
--- a/gallery_dl/version.py
+++ b/gallery_dl/version.py
@@ -6,4 +6,4 @@
 # it under the terms of the GNU General Public License version 2 as
 # published by the Free Software Foundation.
 
-__version__ = "1.8.0"
+__version__ = "1.8.1-dev"