diff --git a/plugins/research_sync/module/sync.lua b/plugins/research_sync/module/sync.lua
index 108e0b2d..75829b7a 100644
--- a/plugins/research_sync/module/sync.lua
+++ b/plugins/research_sync/module/sync.lua
@@ -141,6 +141,10 @@ function research_sync.sync_technologies(data)
     for _, tech_data in pairs(game.json_to_table(data)) do
         local tech = force.technologies[tech_data[nameIndex]]
         if tech and tech.enabled and tech.level <= tech_data[levelIndex] then
+            if tech_data[levelIndex] > tech.prototype.max_level then
+                tech_data[levelIndex] = tech.prototype.max_level
+            end
+
             tech.level = tech_data[levelIndex]
             local progress
             if tech_data[researchedIndex] then
@@ -188,6 +192,10 @@ function research_sync.research_technology(name, level)
         return
     end
 
+    if level > tech.prototype.max_level then
+        level = tech.prototype.max_level
+    end
+
     global.research_sync.ignore_research_finished = true
     if tech == force.current_research and tech.level == level then
         force.research_progress = 1