diff --git a/README.rdoc b/README.rdoc
index 9bb7f71..6e3e959 100644
--- a/README.rdoc
+++ b/README.rdoc
@@ -40,7 +40,7 @@ See Sinatra::Async for more details.
 
 == REQUIREMENTS:
 
-* Sinatra (>= 0.9)
+* Sinatra (>= 1.3.2)
 * An async webserver
 
 == INSTALL:
@@ -70,4 +70,4 @@ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
-SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
\ No newline at end of file
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.