diff --git a/com.reprezen.swagedit.core/src/com/reprezen/swagedit/core/assist/JsonProposalProvider.java b/com.reprezen.swagedit.core/src/com/reprezen/swagedit/core/assist/JsonProposalProvider.java
index ffe2a496..99480540 100644
--- a/com.reprezen.swagedit.core/src/com/reprezen/swagedit/core/assist/JsonProposalProvider.java
+++ b/com.reprezen.swagedit.core/src/com/reprezen/swagedit/core/assist/JsonProposalProvider.java
@@ -212,7 +212,7 @@ protected Collection<ProposalDescriptor> createObjectProposals(ObjectTypeDefinit
     protected Collection<ProposalDescriptor> createArrayProposals(ArrayTypeDefinition type, AbstractNode node) {
         Collection<ProposalDescriptor> proposals = new LinkedHashSet<>();
 
-        if (type.itemsType.getType() == JsonType.ENUM) {
+        if (type.itemsType != null && type.itemsType.getType() == JsonType.ENUM) {
             String labelType = type.itemsType.getContainingProperty();
 
             for (String literal : enumLiterals(type.itemsType)) {
diff --git a/com.reprezen.swagedit.openapi3/src/com/reprezen/swagedit/openapi3/schema/schema_v3.json b/com.reprezen.swagedit.openapi3/src/com/reprezen/swagedit/openapi3/schema/schema_v3.json
index c9276700..a8774987 100644
--- a/com.reprezen.swagedit.openapi3/src/com/reprezen/swagedit/openapi3/schema/schema_v3.json
+++ b/com.reprezen.swagedit.openapi3/src/com/reprezen/swagedit/openapi3/schema/schema_v3.json
@@ -416,7 +416,16 @@
           "type": "boolean"
         },
         "style": {
-          "type": "string"
+          "type": "string",
+          "enum": [
+            "matrix",
+            "label",
+            "form",
+            "simple",
+            "spaceDelimited",
+            "pipeDelimited",
+            "deepObject"
+          ]
         },
         "explode": {
           "type": "boolean"