diff --git a/ports/mlpack/vcpkg.json b/ports/mlpack/vcpkg.json
index 9575c276cd..382e885d3c 100644
--- a/ports/mlpack/vcpkg.json
+++ b/ports/mlpack/vcpkg.json
@@ -1,7 +1,7 @@
 {
   "name": "mlpack",
   "version": "3.4.1",
-  "port-version": 4,
+  "port-version": 5,
   "description": "mlpack is a fast, flexible machine learning library, written in C++, that aims to provide fast, extensible implementations of cutting-edge machine learning algorithms.",
   "homepage": "https://github.com/mlpack/mlpack",
   "supports": "!uwp",
@@ -29,7 +29,10 @@
       "description": "use OpenMP for parallelization."
     },
     "tools": {
-      "description": "Build command-line executables."
+      "description": "Build command-line executables.",
+      "dependencies": [
+        "boost-format"
+      ]
     }
   }
 }
diff --git a/versions/baseline.json b/versions/baseline.json
index cce5bc1801..ba1525ffa9 100644
--- a/versions/baseline.json
+++ b/versions/baseline.json
@@ -4438,7 +4438,7 @@
     },
     "mlpack": {
       "baseline": "3.4.1",
-      "port-version": 4
+      "port-version": 5
     },
     "mman": {
       "baseline": "git-f5ff813",
diff --git a/versions/m-/mlpack.json b/versions/m-/mlpack.json
index df1ee0f0f4..f723df3054 100644
--- a/versions/m-/mlpack.json
+++ b/versions/m-/mlpack.json
@@ -1,5 +1,10 @@
 {
   "versions": [
+    {
+      "git-tree": "1ba342c0a0a5e88c4424207c3296b8db8c7062fc",
+      "version": "3.4.1",
+      "port-version": 5
+    },
     {
       "git-tree": "eb3aaa9dbc3991962b70c2c819d66e5c018ad41a",
       "version": "3.4.1",