diff --git a/go.mod b/go.mod
index 4db0ebd..b681d57 100644
--- a/go.mod
+++ b/go.mod
@@ -4,10 +4,10 @@ go 1.20
 
 require (
 	golang.org/x/mod v0.11.0
-	golang.org/x/tools v0.2.0
+	golang.org/x/tools v0.6.0
 )
 
 require (
 	github.com/yuin/goldmark v1.4.13 // indirect
-	golang.org/x/sys v0.1.0 // indirect
+	golang.org/x/sys v0.15.0 // indirect
 )
diff --git a/go.sum b/go.sum
index 38c7646..093ed9c 100644
--- a/go.sum
+++ b/go.sum
@@ -2,7 +2,7 @@ github.com/yuin/goldmark v1.4.13 h1:fVcFKWvrslecOb/tg+Cc05dkeYx540o0FuFt3nUVDoE=
 github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
 golang.org/x/mod v0.11.0 h1:bUO06HqtnRcc/7l71XBe4WcqTZ+3AH1J59zWDDwLKgU=
 golang.org/x/mod v0.11.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
-golang.org/x/sys v0.1.0 h1:kunALQeHf1/185U1i0GOB/fy1IPRDDpuoOOqRReG57U=
-golang.org/x/sys v0.1.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/tools v0.2.0 h1:G6AHpWxTMGY1KyEYoAQ5WTtIekUUvDNjan3ugu60JvE=
-golang.org/x/tools v0.2.0/go.mod h1:y4OqIKeOV/fWJetJ8bXPU1sEVniLMIyDAZWeHdV+NTA=
+golang.org/x/sys v0.15.0 h1:h48lPFYpsTvQJZF4EKyI4aLHaev3CxivZmv7yZig9pc=
+golang.org/x/sys v0.15.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/tools v0.6.0 h1:BOw41kyTf3PuCW1pVQf8+Cyg8pMlkYB1oo9iJ6D/lKM=
+golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
diff --git a/mockgen/model/model.go b/mockgen/model/model.go
index 853dbf2..6626f64 100644
--- a/mockgen/model/model.go
+++ b/mockgen/model/model.go
@@ -415,10 +415,31 @@ func typeFromType(t reflect.Type) (Type, error) {
 	}
 
 	if imp := t.PkgPath(); imp != "" {
-		return &NamedType{
+
+		typeObj := &NamedType{
 			Package: impPath(imp),
 			Type:    t.Name(),
-		}, nil
+		}
+		if typeName := t.Name(); strings.ContainsAny(typeName, "[]") {
+			var ts []Type
+			startIndex := strings.Index(typeName, "[")
+			endIndex := strings.Index(typeName, "]")
+			if startIndex == -1 || endIndex == -1 || startIndex > endIndex {
+				return nil, fmt.Errorf("%s is not a valid generic type name", typeName)
+			}
+			typeObj.Type = typeName[:startIndex]
+			for _, element := range strings.Split(typeName[startIndex+1:endIndex], ",") {
+				sepIndex := strings.LastIndex(element, ".")
+				ts = append(ts, &NamedType{
+					Package: impPath(element[:sepIndex]),
+					Type:    element[sepIndex+1:],
+				})
+			}
+			typeObj.TypeParams = &TypeParametersType{
+				TypeParameters: ts,
+			}
+		}
+		return typeObj, nil
 	}
 
 	// only unnamed or predeclared types after here