diff --git a/.github/matrix.json b/.github/matrix.json
index 9b5b61bb..9a7d5d12 100644
--- a/.github/matrix.json
+++ b/.github/matrix.json
@@ -1,24 +1,99 @@
 {
   "include": [
     {
-      "otp": "25",
-      "elixir": "1.15.8",
+      "otp": "28",
+      "elixir": "1.18.4",
       "project": "engine"
     },
     {
-      "otp": "25",
-      "elixir": "1.15.8",
-      "project": "expert"
+      "otp": "27",
+      "elixir": "1.18",
+      "project": "engine"
+    },
+    {
+      "otp": "26",
+      "elixir": "1.18",
+      "project": "engine"
+    },
+    {
+      "otp": "27",
+      "elixir": "1.17",
+      "project": "engine"
+    },
+    {
+      "otp": "26",
+      "elixir": "1.17",
+      "project": "engine"
+    },
+    {
+      "otp": "26",
+      "elixir": "1.16",
+      "project": "engine"
+    },
+    {
+      "otp": "28",
+      "elixir": "1.18.4",
+      "project": "expert_credo"
+    },
+    {
+      "otp": "27",
+      "elixir": "1.18",
+      "project": "expert_credo"
+    },
+    {
+      "otp": "26",
+      "elixir": "1.18",
+      "project": "expert_credo"
     },
     {
-      "otp": "25",
-      "elixir": "1.15.8",
+      "otp": "27",
+      "elixir": "1.17",
       "project": "expert_credo"
     },
     {
-      "otp": "25",
-      "elixir": "1.15.8",
+      "otp": "26",
+      "elixir": "1.17",
+      "project": "expert_credo"
+    },
+    {
+      "otp": "26",
+      "elixir": "1.16",
+      "project": "expert_credo"
+    },
+    {
+      "otp": "28",
+      "elixir": "1.18.4",
+      "project": "forge"
+    },
+    {
+      "otp": "27",
+      "elixir": "1.18",
+      "project": "forge"
+    },
+    {
+      "otp": "26",
+      "elixir": "1.18",
       "project": "forge"
+    },
+    {
+      "otp": "27",
+      "elixir": "1.17",
+      "project": "forge"
+    },
+    {
+      "otp": "26",
+      "elixir": "1.17",
+      "project": "forge"
+    },
+    {
+      "otp": "26",
+      "elixir": "1.16",
+      "project": "forge"
+    },
+    {
+      "otp": "27.3.4.1",
+      "elixir": "1.17.3",
+      "project": "expert"
     }
   ]
 }
\ No newline at end of file
diff --git a/matrix.exs b/matrix.exs
index 7e7929ec..095ba13d 100644
--- a/matrix.exs
+++ b/matrix.exs
@@ -1,30 +1,19 @@
 Mix.install([:jason])
 
-projects = [
-  "engine",
-  "expert",
-  "expert_credo",
-  "forge"
-]
-
-# TODO(#44): renable these once we make the repo public
 versions = [
-  # %{elixir: "1.18.1", otp: "27"},
-  # %{elixir: "1.18.1", otp: "26"},
-  # %{elixir: "1.17", otp: "27"},
-  # %{elixir: "1.17", otp: "26"},
-  # %{elixir: "1.17", otp: "25"},
-  # %{elixir: "1.16", otp: "26"},
-  # %{elixir: "1.16", otp: "25"},
-  # %{elixir: "1.15.8", otp: "26"},
-  %{elixir: "1.15.8", otp: "25"}
+  %{elixir: "1.18.4", otp: "28"},
+  %{elixir: "1.18", otp: "27"},
+  %{elixir: "1.18", otp: "26"},
+  %{elixir: "1.17", otp: "27"},
+  %{elixir: "1.17", otp: "26"},
+  %{elixir: "1.16", otp: "26"},
 ]
 
 %{
   include:
-    for project <- projects, version <- versions do
+    for project <- ["engine", "expert_credo", "forge"], version <- versions do
       Map.put(version, :project, project)
-    end
+    end ++ [%{elixir: "1.17.3", otp: "27.3.4.1", project: "expert"}]
 }
 |> Jason.encode!(pretty: true)
 |> then(&File.write!(".github/matrix.json", &1))