diff --git a/core/assets/maps/navalFortress.msav b/core/assets/maps/navalFortress.msav
index 00416a46d0..a1218dad88 100644
Binary files a/core/assets/maps/navalFortress.msav and b/core/assets/maps/navalFortress.msav differ
diff --git a/core/src/mindustry/content/SerpuloTechTree.java b/core/src/mindustry/content/SerpuloTechTree.java
index 726dc129c7..ee80ec5ece 100644
--- a/core/src/mindustry/content/SerpuloTechTree.java
+++ b/core/src/mindustry/content/SerpuloTechTree.java
@@ -549,8 +549,11 @@ public class SerpuloTechTree{
                                         node(navalFortress, Seq.with(
                                         new SectorComplete(coastline),
                                         new SectorComplete(extractionOutpost),
+                                        new Research(coreNucleus),
+                                        new Research(massDriver),
                                         new Research(oxynoe),
                                         new Research(minke),
+                                        new Research(bryde),
                                         new Research(cyclone),
                                         new Research(ripple)
                                         ), () -> {