diff --git a/README.md b/README.md
index 0cd3191a9..0ae168b35 100644
--- a/README.md
+++ b/README.md
@@ -15,6 +15,10 @@ It currently consists of
 
 # Release Notes
 BOAT is still under development and subject to change.
+
+## 0.17.75
+* Added support for type-level validation in collections via the `x-not-null` vendor extension to allow `@NotNull` annotations on generic type arguments.
+
 ## 0.17.74
 * Swift5: Removed deprecated initializer from model objects. The initializer is now internal and only accessible through the Builder pattern, preventing breaking code from deprecation warnings.
 
diff --git a/boat-scaffold/src/main/templates/boat-spring/beanValidationCore.mustache b/boat-scaffold/src/main/templates/boat-spring/beanValidationCore.mustache
index 7faf96bc9..af85b9dd3 100644
--- a/boat-scaffold/src/main/templates/boat-spring/beanValidationCore.mustache
+++ b/boat-scaffold/src/main/templates/boat-spring/beanValidationCore.mustache
@@ -1,3 +1,4 @@
+{{#vendorExtensions.x-not-null}}@NotNull{{/vendorExtensions.x-not-null}}
 {{#pattern}}{{^isByteArray}}@Pattern(regexp = "{{{pattern}}}") {{/isByteArray}}{{/pattern}}{{!
 minLength && maxLength set
 }}{{#minLength}}{{#maxLength}}@Size(min = {{minLength}}, max = {{maxLength}}) {{/maxLength}}{{/minLength}}{{!
diff --git a/boat-scaffold/src/test/resources/boat-spring/paths/array-types.yaml b/boat-scaffold/src/test/resources/boat-spring/paths/array-types.yaml
index 54f86caef..3d00d823e 100644
--- a/boat-scaffold/src/test/resources/boat-spring/paths/array-types.yaml
+++ b/boat-scaffold/src/test/resources/boat-spring/paths/array-types.yaml
@@ -86,6 +86,15 @@ get:
           minLength: 1
           maxLength: 36
           pattern: '^[A-Z]+$'
+    - name: q-params-not-null
+      in: query
+      required: false
+      schema:
+        type: array
+        items:
+          type: string
+          x-not-null: true
+          pattern: '^[A-Z]+$'
     - name: q-params-set
       in: query
       required: false
diff --git a/boat-scaffold/src/test/resources/boat-spring/paths/map-types.yaml b/boat-scaffold/src/test/resources/boat-spring/paths/map-types.yaml
index 482e7d330..f5067a227 100644
--- a/boat-scaffold/src/test/resources/boat-spring/paths/map-types.yaml
+++ b/boat-scaffold/src/test/resources/boat-spring/paths/map-types.yaml
@@ -86,6 +86,15 @@ get:
           minLength: 1
           maxLength: 36
           pattern: '^[A-Z]+$'
+    - name: q-params-not-null
+      in: query
+      required: false
+      schema:
+        type: array
+        items:
+          type: string
+          x-not-null: true
+          pattern: '^[A-Z]+$'
     - name: q-params-set
       in: query
       required: false
diff --git a/boat-scaffold/src/test/resources/boat-spring/paths/set-types.yaml b/boat-scaffold/src/test/resources/boat-spring/paths/set-types.yaml
index e80d7c304..d17ced230 100644
--- a/boat-scaffold/src/test/resources/boat-spring/paths/set-types.yaml
+++ b/boat-scaffold/src/test/resources/boat-spring/paths/set-types.yaml
@@ -97,6 +97,16 @@ get:
           minLength: 1
           maxLength: 36
           pattern: '^[A-Z]+$'
+    - name: q-params-not-null
+      in: query
+      required: false
+      schema:
+        type: array
+        uniqueItems: true
+        items:
+          type: string
+          x-not-null: true
+          pattern: '^[A-Z]+$'
     - name: q-params-set-req
       in: query
       required: true
diff --git a/boat-scaffold/src/test/resources/boat-spring/paths/simple-types.yaml b/boat-scaffold/src/test/resources/boat-spring/paths/simple-types.yaml
index f347352b0..b3f101348 100644
--- a/boat-scaffold/src/test/resources/boat-spring/paths/simple-types.yaml
+++ b/boat-scaffold/src/test/resources/boat-spring/paths/simple-types.yaml
@@ -86,6 +86,16 @@ get:
           minLength: 1
           maxLength: 36
           pattern: '^[A-Z]+$'
+    - name: q-params-not-null
+      in: query
+      required: false
+      schema:
+        type: array
+        uniqueItems: true
+        items:
+          type: string
+          x-not-null: true
+          pattern: '^[A-Z]+$'
     - name: q-params-set
       in: query
       required: false