diff --git a/CHANGELOG.md b/CHANGELOG.md
index 32a6b3e9..6fbfadfc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -25,4 +25,8 @@
 - **[Breaking Change]**: rename initializer from `init(initialFrom:)` to `init(resetFrom:)` in `ResettableType`
 - **Add**: `SeparatorCell` with `SeparatorCellViewModel`
 - **Add**: `AnyBaseTableRow` for type-erasure
-- **Add**: `EmptyCellRow` for empty cell with static height
\ No newline at end of file
+- **Add**: `EmptyCellRow` for empty cell with static height
+
+## 0.5.12
+
+- **Fix**: Update type of `viewModel` in `ConfigurableController` to `ImplicitlyUwrappedOptional<ViewModelT>` instead of `ViewModelT`
\ No newline at end of file
diff --git a/LeadKit.podspec b/LeadKit.podspec
index d282fe81..e5284c35 100644
--- a/LeadKit.podspec
+++ b/LeadKit.podspec
@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name            = "LeadKit"
-  s.version         = "0.5.11"
+  s.version         = "0.5.12"
   s.summary         = "iOS framework with a bunch of tools for rapid development"
   s.homepage        = "https://github.com/TouchInstinct/LeadKit"
   s.license         = "Apache License, Version 2.0"
diff --git a/Sources/Protocols/ConfigurableController.swift b/Sources/Protocols/ConfigurableController.swift
index 9190f9db..fd14a19b 100644
--- a/Sources/Protocols/ConfigurableController.swift
+++ b/Sources/Protocols/ConfigurableController.swift
@@ -26,7 +26,7 @@ public protocol ConfigurableController {
 
     associatedtype ViewModelT
 
-    var viewModel: ViewModelT { get }
+    var viewModel: ViewModelT! { get }
 
     func bindViews()