diff --git a/CHANGELOG.md b/CHANGELOG.md
index aac4199..7e0f694 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,23 @@
 # Changelog
 
+## 2024-05-05
+
+### v0.9.0 (All Packages)
+
+#### Features
+
+- Field revalidation is now supported with the `FormValidityObserver` via the `revalidateOn` option.
+- You can now pass `null` to the `type` argument of the `FormValidityObserver` to use it in "Manual Mode".
+
+Please see the [documentation](./docs/form-validity-observer/README.md) for more details on how to use these new features.
+
+#### Breaking Changes
+
+- Arrays are no longer supported for the `FormValidityObserver`'s `type` constructor argument.
+- The `useFormValidityObserver` React hook has been removed because it isn't genuinely useful. (**React only**)
+
+If you'd like to understand why these breaking changes were made, please see the [Design Decisions](./docs/extras/design-decisions.md) document.
+
 ## 2024-04-21
 
 ### v0.8.0 (All Packages)
diff --git a/package-lock.json b/package-lock.json
index 21b1fa1..2c630eb 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -7950,7 +7950,7 @@
     },
     "packages/core": {
       "name": "@form-observer/core",
-      "version": "0.8.0",
+      "version": "0.9.0",
       "license": "MIT",
       "devDependencies": {
         "@testing-library/dom": "^9.3.4"
@@ -7958,55 +7958,55 @@
     },
     "packages/lit": {
       "name": "@form-observer/lit",
-      "version": "0.8.0",
+      "version": "0.9.0",
       "license": "MIT",
       "peerDependencies": {
-        "@form-observer/core": "^0.8.0",
+        "@form-observer/core": "^0.9.0",
         "lit": ">=3.0.0"
       }
     },
     "packages/preact": {
       "name": "@form-observer/preact",
-      "version": "0.8.0",
+      "version": "0.9.0",
       "license": "MIT",
       "devDependencies": {
         "@preact/preset-vite": "^2.8.2",
         "@testing-library/preact": "^3.2.3"
       },
       "peerDependencies": {
-        "@form-observer/core": "^0.8.0",
+        "@form-observer/core": "^0.9.0",
         "preact": ">=9.0.0"
       }
     },
     "packages/react": {
       "name": "@form-observer/react",
-      "version": "0.8.0",
+      "version": "0.9.0",
       "license": "MIT",
       "devDependencies": {
         "@testing-library/react": "^14.3.1",
         "@types/react": "^18.2.77"
       },
       "peerDependencies": {
-        "@form-observer/core": "^0.8.0",
+        "@form-observer/core": "^0.9.0",
         "react": ">=16.8.0"
       }
     },
     "packages/solid": {
       "name": "@form-observer/solid",
-      "version": "0.8.0",
+      "version": "0.9.0",
       "license": "MIT",
       "devDependencies": {
         "@solidjs/testing-library": "^0.8.6",
         "vite-plugin-solid": "^2.9.1"
       },
       "peerDependencies": {
-        "@form-observer/core": "^0.8.0",
+        "@form-observer/core": "^0.9.0",
         "solid-js": ">=1.0.0"
       }
     },
     "packages/svelte": {
       "name": "@form-observer/svelte",
-      "version": "0.8.0",
+      "version": "0.9.0",
       "license": "MIT",
       "devDependencies": {
         "@sveltejs/vite-plugin-svelte": "^3.1.0",
@@ -8014,12 +8014,12 @@
         "svelte": "^4.2.13"
       },
       "peerDependencies": {
-        "@form-observer/core": "^0.8.0"
+        "@form-observer/core": "^0.9.0"
       }
     },
     "packages/vue": {
       "name": "@form-observer/vue",
-      "version": "0.8.0",
+      "version": "0.9.0",
       "license": "MIT",
       "devDependencies": {
         "@testing-library/vue": "^8.0.3",
@@ -8027,7 +8027,7 @@
         "vue": "^3.3.6"
       },
       "peerDependencies": {
-        "@form-observer/core": "^0.8.0"
+        "@form-observer/core": "^0.9.0"
       }
     }
   }
diff --git a/packages/core/package.json b/packages/core/package.json
index 0d561fa..5f68db0 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@form-observer/core",
   "type": "module",
-  "version": "0.8.0",
+  "version": "0.9.0",
   "sideEffects": false,
   "description": "A simple utility for reacting to events from a form's fields",
   "exports": {
diff --git a/packages/lit/package.json b/packages/lit/package.json
index d91438c..5ac351b 100644
--- a/packages/lit/package.json
+++ b/packages/lit/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@form-observer/lit",
   "type": "module",
-  "version": "0.8.0",
+  "version": "0.9.0",
   "sideEffects": false,
   "description": "Convenience functions for the `@form-observer/core` package, designed for Lit apps",
   "exports": {
@@ -31,7 +31,7 @@
     }
   },
   "peerDependencies": {
-    "@form-observer/core": "^0.8.0",
+    "@form-observer/core": "^0.9.0",
     "lit": ">=3.0.0"
   },
   "author": "Isaiah Thomason",
diff --git a/packages/preact/package.json b/packages/preact/package.json
index 17cdeed..c9f2292 100644
--- a/packages/preact/package.json
+++ b/packages/preact/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@form-observer/preact",
   "type": "module",
-  "version": "0.8.0",
+  "version": "0.9.0",
   "sideEffects": false,
   "description": "Convenience functions for the `@form-observer/core` package, designed for Preact apps",
   "exports": {
@@ -29,7 +29,7 @@
     }
   },
   "peerDependencies": {
-    "@form-observer/core": "^0.8.0",
+    "@form-observer/core": "^0.9.0",
     "preact": ">=9.0.0"
   },
   "devDependencies": {
diff --git a/packages/react/package.json b/packages/react/package.json
index 55e9de8..626bae7 100644
--- a/packages/react/package.json
+++ b/packages/react/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@form-observer/react",
   "type": "module",
-  "version": "0.8.0",
+  "version": "0.9.0",
   "sideEffects": false,
   "description": "Convenience functions for the `@form-observer/core` package, designed for React apps",
   "exports": {
@@ -29,7 +29,7 @@
     }
   },
   "peerDependencies": {
-    "@form-observer/core": "^0.8.0",
+    "@form-observer/core": "^0.9.0",
     "react": ">=16.8.0"
   },
   "devDependencies": {
diff --git a/packages/solid/package.json b/packages/solid/package.json
index 27a84fe..1dab3f0 100644
--- a/packages/solid/package.json
+++ b/packages/solid/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@form-observer/solid",
   "type": "module",
-  "version": "0.8.0",
+  "version": "0.9.0",
   "sideEffects": false,
   "description": "Convenience functions for the `@form-observer/core` package, designed for Solid apps",
   "exports": {
@@ -29,7 +29,7 @@
     }
   },
   "peerDependencies": {
-    "@form-observer/core": "^0.8.0",
+    "@form-observer/core": "^0.9.0",
     "solid-js": ">=1.0.0"
   },
   "devDependencies": {
diff --git a/packages/svelte/package.json b/packages/svelte/package.json
index 2d73e28..cadac7e 100644
--- a/packages/svelte/package.json
+++ b/packages/svelte/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@form-observer/svelte",
   "type": "module",
-  "version": "0.8.0",
+  "version": "0.9.0",
   "sideEffects": false,
   "description": "Convenience functions for the `@form-observer/core` package, designed for Svelte apps",
   "exports": {
@@ -29,7 +29,7 @@
     }
   },
   "peerDependencies": {
-    "@form-observer/core": "^0.8.0"
+    "@form-observer/core": "^0.9.0"
   },
   "devDependencies": {
     "@sveltejs/vite-plugin-svelte": "^3.1.0",
diff --git a/packages/vue/package.json b/packages/vue/package.json
index 21be8d1..10b7831 100644
--- a/packages/vue/package.json
+++ b/packages/vue/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@form-observer/vue",
   "type": "module",
-  "version": "0.8.0",
+  "version": "0.9.0",
   "sideEffects": false,
   "description": "Convenience functions for the `@form-observer/core` package, designed for Vue apps",
   "exports": {
@@ -29,7 +29,7 @@
     }
   },
   "peerDependencies": {
-    "@form-observer/core": "^0.8.0"
+    "@form-observer/core": "^0.9.0"
   },
   "devDependencies": {
     "@testing-library/vue": "^8.0.3",