diff --git a/.gitignore b/.gitignore
index 8cf7fa5..c7d1eef 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,3 +11,4 @@ HTTP-4000.0.9.tar.gz
 /HTTP-4000.3.9.tar.gz
 /HTTP-4000.3.12.tar.gz
 /HTTP-4000.3.14.tar.gz
+/HTTP-4000.3.15.tar.gz
diff --git a/HTTP-4000.3.14.cabal b/HTTP-4000.3.15.cabal
similarity index 93%
rename from HTTP-4000.3.14.cabal
rename to HTTP-4000.3.15.cabal
index f23b564..a9de06f 100644
--- a/HTTP-4000.3.14.cabal
+++ b/HTTP-4000.3.15.cabal
@@ -1,7 +1,7 @@
 Name: HTTP
-Version: 4000.3.14
-x-revision: 1
-Cabal-Version: >= 1.8
+Version: 4000.3.15
+x-revision: 2
+Cabal-Version: >= 1.10
 Build-type: Simple
 License: BSD3
 License-file: LICENSE
@@ -111,10 +111,11 @@ Library
   -- note the test harness constraints should be kept in sync with these
   -- where dependencies are shared
   Build-depends: base >= 4.3.0.0 && < 4.15, parsec >= 2.0 && < 3.2
-  Build-depends: array >= 0.3.0.2 && < 0.6, bytestring >= 0.9.1.5 && < 0.11
-  Build-depends: time >= 1.1.2.3 && < 1.10
+  Build-depends: array >= 0.3.0.2 && < 0.6, bytestring >= 0.9.1.5 && < 0.12
+  Build-depends: time >= 1.1.2.3 && < 1.11
 
-  Extensions: FlexibleInstances
+  default-language: Haskell98
+  default-extensions: FlexibleInstances
 
   if flag(mtl1)
     Build-depends: mtl >= 1.1.1.0 && < 1.2
@@ -131,11 +132,12 @@ Library
     ghc-options:      -Werror
 
   if os(windows)
-    Build-depends: Win32 >= 2.2.0.0 && < 2.9
+    Build-depends: Win32 >= 2.2.0.0 && < 2.10
 
 Test-Suite test
   type: exitcode-stdio-1.0
 
+  default-language: Haskell98
   hs-source-dirs: test
   main-is: httpTests.hs
 
@@ -143,13 +145,15 @@ Test-Suite test
     Httpd
     UnitTests
 
+  ghc-options: -Wall
+
   -- note: version constraints for dependencies shared with the library
   -- should be the same
   build-depends:     HTTP,
                      HUnit >= 1.2.0.1 && < 1.7,
                      httpd-shed >= 0.4 && < 0.5,
                      mtl >= 1.1.1.0 && < 2.3,
-                     bytestring >= 0.9.1.5 && < 0.11,
+                     bytestring >= 0.9.1.5 && < 0.12,
                      deepseq >= 1.3.0.0 && < 1.5,
                      pureMD5 >= 0.2.4 && < 2.2,
                      base >= 4.3.0.0 && < 4.15,
@@ -168,7 +172,7 @@ Test-Suite test
                        case-insensitive >= 0.4.0.1 && < 1.3,
                        http-types >= 0.8.0 && < 1.0,
                        wai >= 2.1.0 && < 3.3,
-                       warp >= 2.1.0 && < 3.3
+                       warp >= 2.1.0 && < 3.4
 
     if flag(conduit10)
       build-depends:
diff --git a/ghc-HTTP.spec b/ghc-HTTP.spec
index 02da139..ae47780 100644
--- a/ghc-HTTP.spec
+++ b/ghc-HTTP.spec
@@ -7,8 +7,8 @@
 # testsuite missing deps: httpd-shed test-framework test-framework-hunit
 
 Name:           ghc-%{pkg_name}
-Version:        4000.3.14
-Release:        8%{?dist}
+Version:        4000.3.15
+Release:        1%{?dist}
 Summary:        A library for client-side HTTP
 
 License:        BSD
@@ -125,6 +125,9 @@ cp -bp %{SOURCE1} %{pkg_name}.cabal
 
 
 %changelog
+* Thu Aug  5 2021 Jens Petersen <petersen@redhat.com> - 4000.3.15-1
+- update to 4000.3.15
+
 * Thu Jul 22 2021 Fedora Release Engineering <releng@fedoraproject.org> - 4000.3.14-8
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_35_Mass_Rebuild
 
diff --git a/sources b/sources
index f620a35..6f217ed 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (HTTP-4000.3.14.tar.gz) = bcc9107412f3ff5806369675ae6cfd87c4ecc36490eab6d62c697f47e62ff8b0d1d6a25f9bfb9d8ef1f037492820eb732cb9cbec7ea9e7e4b20699573077b064
+SHA512 (HTTP-4000.3.15.tar.gz) = 74015725d15f5dcd1f7212100e26ae82da31201b77e729322ea95e88018ae1ef3a1bd5c2b8ac525f14276a24f2781de9de757aa5f83c71e260d6a61223b756d2