diff --git a/README.md b/README.md
index a7183c32..91e2c6c3 100644
--- a/README.md
+++ b/README.md
@@ -33,7 +33,7 @@ This will automatically install run-time lua dependencies for you.
   - [luaossl](http://25thandclement.com/~william/projects/luaossl.html) >= 20161208
   - [basexx](https://github.com/aiq/basexx/) >= 0.2.0
   - [lpeg](http://www.inf.puc-rio.br/~roberto/lpeg/lpeg.html)
-  - [lpeg_patterns](https://github.com/daurnimator/lpeg_patterns) >= 0.3
+  - [lpeg_patterns](https://github.com/daurnimator/lpeg_patterns) >= 0.5
   - [fifo](https://github.com/daurnimator/fifo.lua)
 
 To use gzip compression you need **one** of:
diff --git a/http-scm-0.rockspec b/http-scm-0.rockspec
index af1601fc..e6a2a609 100644
--- a/http-scm-0.rockspec
+++ b/http-scm-0.rockspec
@@ -19,7 +19,7 @@ dependencies = {
 	"luaossl >= 20161208";
 	"basexx >= 0.2.0";
 	"lpeg";
-	"lpeg_patterns >= 0.3";
+	"lpeg_patterns >= 0.5";
 	"fifo";
 }
 
diff --git a/http/request.lua b/http/request.lua
index aa806482..fccd843f 100644
--- a/http/request.lua
+++ b/http/request.lua
@@ -36,7 +36,7 @@ local request_mt = {
 }
 
 local EOF = lpeg.P(-1)
-local sts_patt = lpeg.Cf(lpeg.Ct(true) * http_patts.Strict_Transport_Security, rawset) * EOF
+local sts_patt = http_patts.Strict_Transport_Security * EOF
 local uri_patt = uri_patts.uri * EOF
 local uri_ref = uri_patts.uri_reference * EOF