diff --git a/versions/baseline.json b/versions/baseline.json
index 527e0323..f5f3270d 100644
--- a/versions/baseline.json
+++ b/versions/baseline.json
@@ -41,7 +41,7 @@
       "port-version": 0
     },
     "eigen3": {
-      "baseline": "2024-08-01",
+      "baseline": "3.4.1-20240316",
       "port-version": 0
     },
     "etcpak": {
diff --git a/versions/e-/eigen3.json b/versions/e-/eigen3.json
index 8b4425f5..482cdf0f 100644
--- a/versions/e-/eigen3.json
+++ b/versions/e-/eigen3.json
@@ -1,5 +1,10 @@
 {
   "versions": [
+    {
+      "git-tree": "8dac820c36aff75dfbb6c2819fe1cfa2999b1e80",
+      "version": "3.4.1-20240316",
+      "port-version": 0
+    },
     {
       "git-tree": "8af3773883ce3b957bb5fb81bae0cdb7bf7a6b9b",
       "version-date": "2024-08-01",