diff --git a/lib/command-parser.js b/lib/command-parser.js
index 28da4d7..ca1c129 100644
--- a/lib/command-parser.js
+++ b/lib/command-parser.js
@@ -142,7 +142,7 @@ class Command {
     return this;
   }
 
-  handle(args, selection, cmdString, playerIsGM, playerId) {
+  handle(args, selection, cmdString, playerIsGM, playerId, requiredCharVersion) {
     if (!playerIsGM && this.gmOnly) {
       throw new UserError('You must be a GM to run this command');
     }
@@ -157,7 +157,8 @@ class Command {
       },
     });
 
-    startOptions.selected = this.selectionSpec && processSelection(selection || [], this.selectionSpec, this.roll20);
+    startOptions.selected =
+      this.selectionSpec && processSelection(selection || [], this.selectionSpec, this.roll20, requiredCharVersion);
     const finalOptions = _.chain(args)
       .reduce((options, arg) => {
         if (!_.some(this.parsers, parser => parser(arg, options.errors, options))) {
@@ -224,14 +225,23 @@ class Command {
   }
 }
 
-function processSelection(selection, constraints, roll20) {
+function processSelection(selection, constraints, roll20, requiredCharVersion) {
   return _.reduce(constraints, (result, constraintDetails, type) => {
     const objects = _.chain(selection)
       .where({ _type: type === 'character' ? 'graphic' : type })
       .map(selected => roll20.getObj(selected._type, selected._id))
       .map((object) => {
         if (type === 'character' && object) {
-          return roll20.getObj('character', object.get('represents'));
+          const char = roll20.getObj('character', object.get('represents'));
+          if (!constraintDetails.anyVersion) {
+            const version = roll20.getAttrByName(char.id, 'version');
+            if (version !== requiredCharVersion) {
+              throw new UserError(`Character ${char.get('name')} is not at the required sheet version ` +
+                `[${requiredCharVersion}], but instead [${version}]. Try opening the character sheet or running ` +
+                '!shaped-update-character to update it.');
+            }
+          }
+          return char;
         }
         return object;
       })
@@ -262,7 +272,12 @@ function processSelection(selection, constraints, roll20) {
 
 module.exports = function commandParser(rootCommand, roll20, errorHandler) {
   const commands = {};
+  let requiredCharVersion = null;
   return {
+    setRequiredCharacterVersion(version) {
+      requiredCharVersion = version;
+    },
+
     addCommand(cmds, handler, gmOnly) {
       const command = new Command(this, handler, roll20, _.isArray(cmds) ? cmds.join(',') : cmds, gmOnly);
       (_.isArray(cmds) ? cmds : [cmds]).forEach(cmdString => (commands[cmdString] = command));
@@ -286,8 +301,8 @@ module.exports = function commandParser(rootCommand, roll20, errorHandler) {
         if (!cmd) {
           throw new UserError(`Unrecognised command ${prefix}${cmdName}`);
         }
-        const returnVal =
-          cmd.handle(parts, msg.selected, `${prefix}${cmdName}`, roll20.playerIsGM(msg.playerid), msg.playerid);
+        const returnVal = cmd.handle(parts, msg.selected, `${prefix}${cmdName}`,
+          roll20.playerIsGM(msg.playerid), msg.playerid, requiredCharVersion);
         if (returnVal instanceof Promise) {
           returnVal.catch(errorHandler);
         }
diff --git a/lib/importer.js b/lib/importer.js
index 8f73b70..fffa344 100644
--- a/lib/importer.js
+++ b/lib/importer.js
@@ -81,6 +81,7 @@ class Importer extends ShapedModule {
         character: {
           min: 0,
           max: Infinity,
+          anyVersion: true,
         },
       })
       .option('all', ShapedConfig.booleanValidator)
diff --git a/lib/shaped-script.js b/lib/shaped-script.js
index fbfe3de..6c780f3 100644
--- a/lib/shaped-script.js
+++ b/lib/shaped-script.js
@@ -447,6 +447,15 @@ function ShapedScripts(logger, myState, roll20, parser, entityLookup, reporter)
   this.checkInstall = function checkInstall() {
     logger.info('-=> ShapedScripts %%GULP_INJECT_VERSION%% <=-');
     Migrator.migrateShapedConfig(myState, logger);
+    const character = roll20.createObj('character', { name: 'SHAPED_VERSION_TESTER' });
+    setTimeout(() => {
+      roll20.createAttrWithWorker(character.id, 'sheet_opened', 1, () => {
+        const version = roll20.getAttrByName(character.id, 'version');
+        character.remove();
+        commandProc.setRequiredCharacterVersion(version);
+        logger.info('Detected sheet version as : $$$', version);
+      });
+    }, 400);
   };
 
   this.wrapHandler = function wrapHandler(handler) {
diff --git a/test/test-ability-maker.js b/test/test-ability-maker.js
new file mode 100644
index 0000000..6700d45
--- /dev/null
+++ b/test/test-ability-maker.js
@@ -0,0 +1,43 @@
+/* globals describe: false, it:false, beforeEach:false, before:false */
+'use strict';
+const Roll20 = require('roll20-wrapper');
+const expect = require('chai').expect;
+const AbilityMaker = require('../lib/ability-maker');
+const sinon = require('sinon');
+const logger = require('./dummy-logger');
+const Reporter = require('./dummy-reporter');
+const cp = require('./dummy-command-parser');
+const Roll20Object = require('./dummy-roll20-object');
+
+describe('ability-maker', function () {
+  let roll20;
+
+  beforeEach(function () {
+    roll20 = new Roll20();
+  });
+
+
+  describe('ability creation', function () {
+    it('should create save ability', function () {
+      sinon.stub(roll20);
+      const characterStub = new Roll20Object('character');
+      characterStub.set('name', 'Bob');
+      const abilityStub = new Roll20Object('ability');
+      roll20.getOrCreateObj.withArgs('ability', {
+        characterid: characterStub.id,
+        name: 'Saves',
+      }).returns(abilityStub);
+      const abilityMaker = new AbilityMaker();
+      abilityMaker.configure(roll20, new Reporter(), logger, {}, cp);
+      abilityMaker.addAbility({
+        selected: { character: [characterStub] },
+        abilities: [abilityMaker.staticAbilityOptions.saves],
+      });
+
+      expect(roll20.getOrCreateObj.withArgs('ability', {
+        characterid: characterStub.id,
+        name: 'Saves',
+      }).callCount).to.equal(1);
+    });
+  });
+});
diff --git a/test/test-shaped-script.js b/test/test-shaped-script.js
index 4994cbe..373e023 100644
--- a/test/test-shaped-script.js
+++ b/test/test-shaped-script.js
@@ -58,35 +58,6 @@ describe('shaped-script', function () {
     });
   });
 
-  describe('ability creation', function () {
-    it('should create save ability', function () {
-      sinon.stub(roll20);
-      const characterStub = new Roll20Object('character');
-      characterStub.set('name', 'Bob');
-      const tokenStub = new Roll20Object('graphic');
-      const abilityStub = new Roll20Object('ability');
-      tokenStub.set('represents', characterStub.id);
-      roll20.getObj.withArgs('graphic', tokenStub.id).returns(tokenStub);
-      roll20.getObj.withArgs('character', characterStub.id).returns(characterStub);
-      roll20.getOrCreateObj.withArgs('ability', {
-        characterid: characterStub.id,
-        name: 'Saves',
-      }).returns(abilityStub);
-      const reporter = new Reporter();
-      const shapedScript = new ShapedScripts(logger, { config: { updateAmmo: true } }, roll20, null,
-        el.entityLookup, reporter);
-      shapedScript.handleInput({
-        type: 'api',
-        content: '!shaped-abilities --saves',
-        selected: [{ _type: 'graphic', _id: tokenStub.id }],
-      });
-      expect(roll20.getOrCreateObj.withArgs('ability', {
-        characterid: characterStub.id,
-        name: 'Saves',
-      }).callCount).to.equal(1);
-    });
-  });
-
   describe('handleSpellCast', function () {
     it('should deal with cantrips correctly', function () {
       const mock = sinon.mock(roll20);