diff --git a/resource/textures/item_texture.json b/resource/textures/item_texture.json
index fcf84476..23d07b23 100644
--- a/resource/textures/item_texture.json
+++ b/resource/textures/item_texture.json
@@ -42,7 +42,7 @@
       "description": "TODO: add description",
       "type": "object",
       "propertyNames": {
-        "pattern": "^[\\w_\\-]+$"
+        "pattern": "^[\\w_\\-\\.]+$"
       },
       "additionalProperties": {
         "title": "Texture data",
diff --git a/resource/textures/terrain_texture.json b/resource/textures/terrain_texture.json
index d695231d..adb799db 100644
--- a/resource/textures/terrain_texture.json
+++ b/resource/textures/terrain_texture.json
@@ -81,7 +81,7 @@
     "texture_data": {
       "type": "object",
       "propertyNames": {
-        "pattern": "^[\\w_\\-]+$"
+        "pattern": "^[\\w_\\-\\.]+$"
       },
       "additionalProperties": {
         "type": "object",