diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,11 @@
 
 ## [Unreleased]
 
+## [1.5.1] - 2026-08-09
+
+### Changed
+- Support openapi3-3.2.5 (#63)
+
 ## [1.5.0] - 2025-07-23
 
 ### Changed
@@ -76,7 +81,8 @@
 ### Added
 - First version of webgear-openapi
 
-[Unreleased]: https://github.com/haskell-webgear/webgear/compare/v1.5.0...HEAD
+[Unreleased]: https://github.com/haskell-webgear/webgear/compare/v1.5.1...HEAD
+[1.5.1]: https://github.com/haskell-webgear/webgear/releases/tag/v1.5.1
 [1.5.0]: https://github.com/haskell-webgear/webgear/releases/tag/v1.5.0
 [1.4.0]: https://github.com/haskell-webgear/webgear/releases/tag/v1.4.0
 [1.3.1]: https://github.com/haskell-webgear/webgear/releases/tag/v1.3.1
diff --git a/src/WebGear/OpenApi/Handler.hs b/src/WebGear/OpenApi/Handler.hs
--- a/src/WebGear/OpenApi/Handler.hs
+++ b/src/WebGear/OpenApi/Handler.hs
@@ -21,7 +21,6 @@
 import Control.Monad ((<=<))
 import Control.Monad.State.Strict (MonadState, State, evalState, state)
 import Data.Coerce (coerce)
-import qualified Data.HashMap.Strict.InsOrd as Map
 import Data.OpenApi (
   OpenApi,
   Operation,
@@ -51,6 +50,12 @@
   RoutePath (..),
   Summary (..),
  )
+
+#if MIN_VERSION_openapi3(3,2,5)
+import qualified Data.HashMap.Strict.InsOrd.Compat as Map
+#else
+import qualified Data.HashMap.Strict.InsOrd as Map
+#endif
 
 -- | A handler that captures `OpenApi` documentation of API specifications.
 newtype OpenApiHandler m a b = OpenApiHandler (OpenApi -> State Documentation OpenApi)
diff --git a/src/WebGear/OpenApi/Trait/Body.hs b/src/WebGear/OpenApi/Trait/Body.hs
--- a/src/WebGear/OpenApi/Trait/Body.hs
+++ b/src/WebGear/OpenApi/Trait/Body.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE CPP #-}
 {-# OPTIONS_GHC -Wno-orphans #-}
 
 -- | OpenApi implementation of 'Body' trait.
@@ -5,7 +6,6 @@
 
 import Control.Lens ((%~), (&), (.~), (<>~), (?~), (^.))
 import Control.Monad.State.Strict (MonadState)
-import qualified Data.HashMap.Strict.InsOrd as Map
 import Data.OpenApi (
   Definitions,
   MediaTypeObject,
@@ -44,6 +44,12 @@
   addRootPath,
   consumeDescription,
  )
+
+#if MIN_VERSION_openapi3(3,2,5)
+import qualified Data.HashMap.Strict.InsOrd.Compat as Map
+#else
+import qualified Data.HashMap.Strict.InsOrd as Map
+#endif
 
 instance (ToSchema val, MIMEType mt) => Get (OpenApiHandler m) (Body mt val) where
   {-# INLINE getTrait #-}
diff --git a/src/WebGear/OpenApi/Trait/Header.hs b/src/WebGear/OpenApi/Trait/Header.hs
--- a/src/WebGear/OpenApi/Trait/Header.hs
+++ b/src/WebGear/OpenApi/Trait/Header.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE CPP #-}
 {-# OPTIONS_GHC -Wno-orphans #-}
 
 -- | OpenApi implementation of 'Header' trait.
@@ -5,7 +6,6 @@
 
 import Control.Lens ((%~), (&), (.~), (<>~), (?~))
 import Control.Monad.State.Strict (MonadState)
-import qualified Data.HashMap.Strict.InsOrd as Map
 import Data.OpenApi (
   Header,
   HeaderName,
@@ -36,6 +36,12 @@
 import WebGear.Core.Trait (Get (..), Set (..))
 import qualified WebGear.Core.Trait.Header as WG
 import WebGear.OpenApi.Handler (Documentation, OpenApiHandler (..), consumeDescription)
+
+#if MIN_VERSION_openapi3(3,2,5)
+import qualified Data.HashMap.Strict.InsOrd.Compat as Map
+#else
+import qualified Data.HashMap.Strict.InsOrd as Map
+#endif
 
 instance (KnownSymbol name, ToSchema val) => Get (OpenApiHandler m) (WG.RequestHeader Required ps name val) where
   {-# INLINE getTrait #-}
diff --git a/src/WebGear/OpenApi/Trait/Method.hs b/src/WebGear/OpenApi/Trait/Method.hs
--- a/src/WebGear/OpenApi/Trait/Method.hs
+++ b/src/WebGear/OpenApi/Trait/Method.hs
@@ -1,15 +1,21 @@
+{-# LANGUAGE CPP #-}
 {-# OPTIONS_GHC -Wno-orphans #-}
 
 -- | OpenApi implementation of 'Method' trait.
 module WebGear.OpenApi.Trait.Method where
 
 import Control.Lens ((%~), (&))
-import qualified Data.HashMap.Strict.InsOrd as Map
 import Data.OpenApi (PathItem (..), paths)
 import Network.HTTP.Types (StdMethod (..))
 import WebGear.Core.Trait (Get (..))
 import WebGear.Core.Trait.Method (Method (..))
 import WebGear.OpenApi.Handler (OpenApiHandler (..), addRouteDocumentation)
+
+#if MIN_VERSION_openapi3(3,2,5)
+import qualified Data.HashMap.Strict.InsOrd.Compat as Map
+#else
+import qualified Data.HashMap.Strict.InsOrd as Map
+#endif
 
 instance Get (OpenApiHandler m) Method where
   {-# INLINE getTrait #-}
diff --git a/src/WebGear/OpenApi/Trait/Status.hs b/src/WebGear/OpenApi/Trait/Status.hs
--- a/src/WebGear/OpenApi/Trait/Status.hs
+++ b/src/WebGear/OpenApi/Trait/Status.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE CPP #-}
 {-# OPTIONS_GHC -Wno-orphans #-}
 
 -- | OpenApi implementation of 'Status' trait.
@@ -5,7 +6,6 @@
 
 import Control.Applicative ((<|>))
 import Control.Lens (at, mapped, (%~), (&), (.~), (?~), (^.))
-import qualified Data.HashMap.Strict.InsOrd as Map
 import Data.Maybe (fromMaybe)
 import Data.OpenApi (
   Operation,
@@ -30,6 +30,12 @@
 import WebGear.Core.Trait (Set, With, setTrait)
 import WebGear.Core.Trait.Status (Status (..))
 import WebGear.OpenApi.Handler (OpenApiHandler (..), addRootPath, consumeDescription)
+
+#if MIN_VERSION_openapi3(3,2,5)
+import qualified Data.HashMap.Strict.InsOrd.Compat as Map
+#else
+import qualified Data.HashMap.Strict.InsOrd as Map
+#endif
 
 instance Set (OpenApiHandler m) Status where
   {-# INLINE setTrait #-}
diff --git a/webgear-openapi.cabal b/webgear-openapi.cabal
--- a/webgear-openapi.cabal
+++ b/webgear-openapi.cabal
@@ -1,7 +1,7 @@
 cabal-version:       2.4
 
 name:                webgear-openapi
-version:             1.5.0
+version:             1.5.1
 synopsis:            Composable, type-safe library to build HTTP API servers
 description:
     WebGear is a library to for building composable, type-safe HTTP API servers.
@@ -11,7 +11,7 @@
 bug-reports:         https://github.com/haskell-webgear/webgear/issues
 author:              Raghu Kaippully
 maintainer:          rkaippully@gmail.com
-copyright:           2020-2025 Raghu Kaippully
+copyright:           2020-2026 Raghu Kaippully
 license:             MPL-2.0
 license-file:        LICENSE
 category:            Web
@@ -73,12 +73,12 @@
                     , base >=4.17.0.0 && <4.22
                     , http-media ==0.8.*
                     , http-types ==0.12.*
-                    , insert-ordered-containers ==0.2.*
+                    , insert-ordered-containers >=0.2.0 && <0.4
                     , lens >=5.2 && <5.4
                     , mtl >=2.2 && <2.4
                     , openapi3 >=3.2.0 && <3.3
                     , text >=2.0 && <2.2
-                    , webgear-core ^>=1.5.0
+                    , webgear-core ^>=1.5.1
   ghc-options:        -Wall
                       -Wcompat
                       -Widentities