diff --git a/CHANGELOG.md b/CHANGELOG.md
index afdc103..9099adf 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,12 @@ All notable changes to the Neo N3 Visual DevTracker extension will be documented
 
 Check [Keep a Changelog](http://keepachangelog.com/) for recommendations on how to structure this file.
 
+## Unreleased
+
+### Changed
+
+- The invoke file editor now supports editing invocation files that use arrays or objects as contract parameters
+
 ## [2.1.49] - 2021-06-21
 
 ### Changed
diff --git a/src/panel/components/contracts/ArgumentInput.tsx b/src/panel/components/contracts/ArgumentInput.tsx
index ba54905..a96b7c0 100644
--- a/src/panel/components/contracts/ArgumentInput.tsx
+++ b/src/panel/components/contracts/ArgumentInput.tsx
@@ -4,12 +4,36 @@ import InputNonDraggable from "../InputNonDraggable";
 import NeoType from "./NeoType";
 
 type Props = {
-  arg?: string | number;
+  arg?: any;
   autoSuggestListId: string;
   isReadOnly: boolean;
   name: string;
   type?: string | number;
-  onUpdate: (newArgument: string | number) => void;
+  onUpdate: (newArgument: any) => void;
+};
+
+const valueToString = (value: any) => {
+  if (!value) {
+    return "";
+  } else if (Array.isArray(value) || typeof value === "object") {
+    return JSON.stringify(value);
+  } else {
+    return `${value}`;
+  }
+};
+
+const stringToValue = (text: string) => {
+  if (`${parseInt(text)}` === text) {
+    return parseInt(text);
+  } else if (`${parseFloat(text)}` === text) {
+    return parseFloat(text);
+  } else {
+    try {
+      return JSON.parse(text);
+    } catch (e) {
+      return `${text}`;
+    }
+  }
 };
 
 export default function ArgumentInput({
@@ -20,7 +44,7 @@ export default function ArgumentInput({
   type,
   onUpdate,
 }: Props) {
-  const [value, setValue] = useState(`${arg || ""}`);
+  const [value, setValue] = useState(valueToString(arg));
   const inputStyle: React.CSSProperties = {
     color: "var(--vscode-input-foreground)",
     backgroundColor: "var(--vscode-input-background)",
@@ -31,15 +55,6 @@ export default function ArgumentInput({
     padding: 1,
     marginLeft: 15,
   };
-  const coerceType = (text: string) => {
-    if (`${parseInt(text)}` === text) {
-      return parseInt(text);
-    } else if (`${parseFloat(text)}` === text) {
-      return parseFloat(text);
-    } else {
-      return `${text}`;
-    }
-  };
   return (
     <div style={{ marginLeft: 15, marginTop: 4 }}>
       <div>
@@ -57,12 +72,12 @@ export default function ArgumentInput({
         style={inputStyle}
         type="text"
         value={value}
-        onBlur={(e) => onUpdate(coerceType(e.target.value))}
-        onChange={(e) => setValue(e.target.value)}
+        onBlur={(e) => onUpdate(stringToValue(e.target.value))}
+        onChange={(e) => setValue(valueToString(e.target.value))}
         onKeyDown={(e) => {
           if (e.metaKey) {
             // User may be about to save
-            onUpdate(coerceType(value));
+            onUpdate(stringToValue(value));
           }
         }}
       />
diff --git a/src/panel/components/contracts/ArgumentsInput.tsx b/src/panel/components/contracts/ArgumentsInput.tsx
index 86719b4..c912011 100644
--- a/src/panel/components/contracts/ArgumentsInput.tsx
+++ b/src/panel/components/contracts/ArgumentsInput.tsx
@@ -5,12 +5,12 @@ import * as neonSc from "@cityofzion/neon-core/lib/sc";
 import ArgumentInput from "./ArgumentInput";
 
 type Props = {
-  args: (string | number)[];
+  args: any[];
   autoSuggestListId: string;
   isReadOnly: boolean;
   parameterDefinitions?: neonSc.ContractParameterDefinitionJson[];
   style?: React.CSSProperties;
-  setArguments: (newArguments: (string | number)[]) => void;
+  setArguments: (newArguments: any[]) => void;
 };
 
 export default function ArgumentsInput({
@@ -42,7 +42,7 @@ export default function ArgumentsInput({
           key={`${i}_${_}`}
           name={(parameterDefinitions || [])[i]?.name || `Argument #${i + 1}`}
           type={(parameterDefinitions || [])[i]?.type}
-          onUpdate={(arg: string | number) =>
+          onUpdate={(arg) =>
             setArguments(
               args
                 .map((__, j) => (i === j ? arg : __))
@@ -59,9 +59,7 @@ export default function ArgumentsInput({
           isReadOnly={isReadOnly}
           key={args.length}
           name={`Argument #${args.length + 1}`}
-          onUpdate={(arg: string | number) =>
-            setArguments(arg ? [...args, arg] : [...args])
-          }
+          onUpdate={(arg) => setArguments(arg ? [...args, arg] : [...args])}
         />
       )}
     </div>
diff --git a/src/panel/components/contracts/InvocationStep.tsx b/src/panel/components/contracts/InvocationStep.tsx
index 56fdeb4..67b8976 100644
--- a/src/panel/components/contracts/InvocationStep.tsx
+++ b/src/panel/components/contracts/InvocationStep.tsx
@@ -12,7 +12,7 @@ type Props = {
   i: number;
   contract?: string;
   operation?: string;
-  args?: (string | number)[];
+  args?: any[];
   autoCompleteData: AutoCompleteData;
   argumentSuggestionListId: string;
   forceFocus?: boolean;
@@ -23,11 +23,7 @@ type Props = {
   onDragStart: () => void;
   onDragEnd: () => void;
   onRun: () => void;
-  onUpdate: (
-    contract?: string,
-    operation?: string,
-    args?: (string | number)[]
-  ) => void;
+  onUpdate: (contract?: string, operation?: string, args?: any[]) => void;
 };
 
 export default function InvocationStep({
@@ -124,7 +120,7 @@ export default function InvocationStep({
           operations.find((_) => _.name === operation)?.parameters
         }
         style={{ marginBottom: 10 }}
-        setArguments={(newArguments: (string | number)[]) =>
+        setArguments={(newArguments) =>
           onUpdate(contract, operation, newArguments)
         }
       />
diff --git a/src/shared/messages/invokeFileViewRequest.ts b/src/shared/messages/invokeFileViewRequest.ts
index f0a919c..4ec31e0 100644
--- a/src/shared/messages/invokeFileViewRequest.ts
+++ b/src/shared/messages/invokeFileViewRequest.ts
@@ -13,7 +13,7 @@ type InvokeFileViewRequest = {
     i: number;
     contract?: string;
     operation?: string;
-    args?: (string | number)[];
+    args?: any[];
   };
   updateJson?: string;
 };
diff --git a/src/shared/viewState/invokeFileViewState.ts b/src/shared/viewState/invokeFileViewState.ts
index 1e2d633..17802f5 100644
--- a/src/shared/viewState/invokeFileViewState.ts
+++ b/src/shared/viewState/invokeFileViewState.ts
@@ -11,7 +11,7 @@ type InvokeFileViewState = {
   fileContents: {
     contract?: string;
     operation?: string;
-    args?: (string | number)[];
+    args?: any[];
   }[];
   fileContentsJson: string;
   isPartOfDiffView: boolean;