diff --git a/1.4/Assemblies/ResearchWhatever.dll b/1.4/Assemblies/ResearchWhatever.dll
index 4d54c21..dda916a 100644
Binary files a/1.4/Assemblies/ResearchWhatever.dll and b/1.4/Assemblies/ResearchWhatever.dll differ
diff --git a/Source/ResearchWhatever14/Patches/WorkGiver_ResearcherPatch.cs b/Source/ResearchWhatever14/Patches/WorkGiver_ResearcherPatch.cs
index 8781939..99c994f 100644
--- a/Source/ResearchWhatever14/Patches/WorkGiver_ResearcherPatch.cs
+++ b/Source/ResearchWhatever14/Patches/WorkGiver_ResearcherPatch.cs
@@ -43,7 +43,19 @@ namespace ResearchWhatever.Patches
             return true;
         }
 
-        public static void Prefix(Pawn pawn, Thing t, bool forced)
+        private static bool CanBePicked(this ResearchProjectDef research, Building_ResearchBench bench)
+        {
+            return Find.Storyteller.difficulty.AllowedBy(research.hideWhen)
+                && !research.IsFinished
+                && research.PrerequisitesCompleted
+                && research.TechprintRequirementMet
+                && research.PlayerMechanitorRequirementMet
+                && research.StudiedThingsRequirementsMet
+                && (research.requiredResearchBuilding == null || research.requiredResearchBuilding == bench.def && bench.hasFacilities(research.requiredResearchFacilities))
+                && research.GetModExtension<ResearchWhateverExtansion>()?.ignore != true;
+        }
+
+        internal static void Prefix(Pawn pawn, Thing t, bool forced)
         {
             ResearchProjectDef currentProj = Find.ResearchManager.currentProj;
             if (currentProj != null) return;
@@ -56,12 +68,7 @@ namespace ResearchWhatever.Patches
 
             List<ResearchProjectDef> projects = new List<ResearchProjectDef>(
                 from x in DefDatabase<ResearchProjectDef>.AllDefsListForReading
-                where Find.Storyteller.difficulty.AllowedBy(x.hideWhen)
-                && !x.IsFinished
-                && x.TechprintRequirementMet
-                && x.PrerequisitesCompleted
-                && (x.requiredResearchBuilding == null || x.requiredResearchBuilding == bench.def && bench.hasFacilities(x.requiredResearchFacilities))
-                && x.GetModExtension<ResearchWhateverExtansion>()?.ignore != true
+                where x.CanBePicked(bench)
                 select x);
 
             if (projects.NullOrEmpty())
diff --git a/change.log b/change.log
index b2dbd2a..4408658 100644
--- a/change.log
+++ b/change.log
@@ -1,4 +1,7 @@
-1.0.5
+1.0.6
+- added checking for new prerequisites;
+
+1.0.5
 - 1.4 aye;
 
 1.0.4