diff --git a/CHANGELOG.markdown b/CHANGELOG.markdown
index d944b7e..47982c2 100644
--- a/CHANGELOG.markdown
+++ b/CHANGELOG.markdown
@@ -1,6 +1,8 @@
 ## next
 
-* internals: make fetch_acc unique
+* back off before hitting rate limit on mastodon instances
+* fix: fetch\_acc running multiple copies fetching the same posts
+* internals: increased frequency of refresh jobs, decreased frequency of bookkeeping jobs
 
 ## v1.4.3
 
diff --git a/libforget/mastodon.py b/libforget/mastodon.py
index 6cdbaad..1665f2e 100644
--- a/libforget/mastodon.py
+++ b/libforget/mastodon.py
@@ -87,6 +87,8 @@ def get_api_for_acc(account):
             # https://github.com/tootsuite/mastodon/issues/4637
             # so we have to do this:
             api.timeline()
+            if api.ratelimit_remaining / api.ratelimit_limit < 1/4:
+                raise TemporaryError("Rate limit too low")
             return api
         except MastodonUnauthorizedError as e:
             if sentry: