diff --git a/spine-unity/Assets/Spine/Runtime/spine-unity/Shaders/CGIncludes/Spine-Skeleton-Tint-Common.cginc b/spine-unity/Assets/Spine/Runtime/spine-unity/Shaders/CGIncludes/Spine-Skeleton-Tint-Common.cginc
index acff8bf8a..ccbd29064 100644
--- a/spine-unity/Assets/Spine/Runtime/spine-unity/Shaders/CGIncludes/Spine-Skeleton-Tint-Common.cginc
+++ b/spine-unity/Assets/Spine/Runtime/spine-unity/Shaders/CGIncludes/Spine-Skeleton-Tint-Common.cginc
@@ -6,7 +6,7 @@ float4 fragTintedColor(float4 texColor, float3 darkTintColor, float4 lightTintCo
 	float a = texColor.a * lightTintColorPMA.a;
 
 #if !defined(_STRAIGHT_ALPHA_INPUT)
-	float3 texDarkColor = (texColor.a - texColor.rgb);
+	float3 texDarkColor = max(0.0, a - texColor.rgb);
 #else
 	float3 texDarkColor = (1 - texColor.rgb);
 #endif
diff --git a/spine-unity/Assets/Spine/package.json b/spine-unity/Assets/Spine/package.json
index 31f7ac78b..2189c3afa 100644
--- a/spine-unity/Assets/Spine/package.json
+++ b/spine-unity/Assets/Spine/package.json
@@ -2,7 +2,7 @@
 	"name": "com.esotericsoftware.spine.spine-unity",
 	"displayName": "spine-unity Runtime",
 	"description": "This plugin provides the spine-unity runtime core.",
-	"version": "4.2.47",
+	"version": "4.2.48",
 	"unity": "2018.3",
 	"author": {
 		"name": "Esoteric Software",
diff --git a/spine-unity/Modules/com.esotericsoftware.spine.urp-shaders/package.json b/spine-unity/Modules/com.esotericsoftware.spine.urp-shaders/package.json
index 375338680..3058d8627 100644
--- a/spine-unity/Modules/com.esotericsoftware.spine.urp-shaders/package.json
+++ b/spine-unity/Modules/com.esotericsoftware.spine.urp-shaders/package.json
@@ -2,7 +2,7 @@
   "name": "com.esotericsoftware.spine.urp-shaders",
   "displayName": "Spine Universal RP Shaders",
   "description": "This plugin provides universal render pipeline (URP) shaders for the spine-unity runtime.\n\nPrerequisites:\nIt requires a working installation of the spine-unity runtime, version 4.2.\n(See http://esotericsoftware.com/git/spine-runtimes/spine-unity)",
-  "version": "4.2.28",
+  "version": "4.2.29",
   "unity": "2019.3",
   "author": {
     "name": "Esoteric Software",