diff --git a/humbug/README b/humbug/README
index 63de042..33928f9 100644
--- a/humbug/README
+++ b/humbug/README
@@ -3,7 +3,7 @@
 The Humbug API Python bindings require the following Python libraries:
 
 * simplejson
-* requests (version >= 0.12)
+* requests (version >= 0.12 and << 1.0.0)
 
 #### Using the API
 
diff --git a/humbug/__init__.py b/humbug/__init__.py
index 4e5693f..6ba4f20 100644
--- a/humbug/__init__.py
+++ b/humbug/__init__.py
@@ -34,7 +34,9 @@ from ConfigParser import SafeConfigParser
 
 # Check that we have a recent enough version
 # Older versions don't provide the 'json' attribute on responses.
-assert(requests.__version__ > '0.12')
+assert(requests.__version__ > '0.12.1')
+# And versions in the 1.x series aren't backwards compatible
+assert(requests.__version__ < '1.0.0')
 API_VERSTRING = "/api/v1/"
 
 def generate_option_group(parser):