diff --git a/datamodel/low/base/schema_proxy.go b/datamodel/low/base/schema_proxy.go
index 66290012..4c2614f6 100644
--- a/datamodel/low/base/schema_proxy.go
+++ b/datamodel/low/base/schema_proxy.go
@@ -333,6 +333,9 @@ func (sp *SchemaProxy) computeHash() uint64 {
 		if !sp.IsReference() {
 			return sch.Hash()
 		}
+		if cfg := sp.getSpecConfig(); cfg != nil && cfg.UseSchemaQuickHash && !CheckSchemaProxyForCircularRefs(sp) {
+			return sch.QuickHash()
+		}
 		return sp.hashReference()
 	}
 
diff --git a/datamodel/low/base/schema_proxy_test.go b/datamodel/low/base/schema_proxy_test.go
index 99958f54..ffecbeb9 100644
--- a/datamodel/low/base/schema_proxy_test.go
+++ b/datamodel/low/base/schema_proxy_test.go
@@ -968,6 +968,22 @@ func TestSchemaProxy_QuickHash_BuildsOnMiss(t *testing.T) {
 	assert.Equal(t, built.quickHashKey(), quickHashKeyOf(sp.idx, sp.idx, sp.vn))
 }
 
+func TestSchemaProxyQuickHashIndependentOfModelAccess(t *testing.T) {
+	ClearSchemaQuickHashMap()
+	defer ClearSchemaQuickHashMap()
+	for _, spec := range []string{"type: string\n", "type: integer\n"} {
+		cold := quickHashRefProxy(t, spec, &index.SpecIndexConfig{})
+		warm := quickHashRefProxy(t, spec, &index.SpecIndexConfig{})
+		require.NotNil(t, warm.Schema())
+		assert.Equal(t, cold.Hash(), warm.Hash())
+	}
+	left := quickHashRefProxy(t, "type: string\n", &index.SpecIndexConfig{})
+	right := quickHashRefProxy(t, "type: integer\n", &index.SpecIndexConfig{})
+	require.NotNil(t, left.Schema())
+	require.NotNil(t, right.Schema())
+	assert.NotEqual(t, left.Hash(), right.Hash())
+}
+
 func TestSchemaProxy_CachedQuickHash_Declines(t *testing.T) {
 	ClearSchemaQuickHashMap()
 	defer ClearSchemaQuickHashMap()
diff --git a/datamodel/spec_info.go b/datamodel/spec_info.go
index 2b86d7d2..1a8a569b 100644
--- a/datamodel/spec_info.go
+++ b/datamodel/spec_info.go
@@ -365,8 +365,8 @@ func extractSpecInfoInternal(spec []byte, bypass bool, skipJSON bool) (*SpecInfo
 		}
 		parsed = true
 
-		// so far there is only 2 as a major release of AsyncAPI
-		if majorVersion > 2 {
+		// Detect supported AsyncAPI versions; model construction belongs to libasyncapi.
+		if majorVersion > 3 {
 			if !bypass {
 				specInfo.Error = errors.New("spec is defined as asyncapi, but has a major version that is invalid")
 				return specInfo, specInfo.Error
diff --git a/datamodel/spec_info_asyncapi3_test.go b/datamodel/spec_info_asyncapi3_test.go
new file mode 100644
index 00000000..d7b93576
--- /dev/null
+++ b/datamodel/spec_info_asyncapi3_test.go
@@ -0,0 +1,18 @@
+package datamodel
+
+import (
+	"github.com/pb33f/testify/require"
+	"testing"
+)
+
+func TestExtractSpecInfoAsyncAPI3(t *testing.T) {
+	for _, spec := range []string{"asyncapi: 3.0.0\ninfo: {title: Events, version: 1.0.0}\n", `{"asyncapi":"3.0.0","info":{"title":"Events","version":"1.0.0"}}`} {
+		info, err := ExtractSpecInfo([]byte(spec))
+		require.NoError(t, err)
+		require.Equal(t, "asyncapi", info.SpecType)
+		require.Equal(t, "3.0.0", info.Version)
+		require.NotNil(t, info.RootNode)
+	}
+	_, err := ExtractSpecInfo([]byte("asyncapi: 3.0.0\nasyncapi: 3.0.0\n"))
+	require.Error(t, err)
+}
diff --git a/datamodel/spec_info_test.go b/datamodel/spec_info_test.go
index f4a613c3..9d781968 100644
--- a/datamodel/spec_info_test.go
+++ b/datamodel/spec_info_test.go
@@ -196,7 +196,7 @@ channels:
           type: string
           pattern: '^hello .+$'`
 
-var AsyncAPISpecOdd = `asyncapi: 3.0.0
+var AsyncAPISpecOdd = `asyncapi: 4.0.0
 info:
   title: Hello world application
   version: '0.1.0'`