diff --git a/gulpfile.js b/gulpfile.js
index 2bbea7a..61c8eca 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -36,6 +36,7 @@ gulp.task('copy', function () {
 var tsProject = ts.createProject({
   declarationFiles: true,
   noExternalResolve: true,
+  noImplicitAny: true,
   sortOutput: true,
   sourceRoot: '../scripts'
 });
diff --git a/src/scripts/game/specs/BattleLog.spec.ts b/src/scripts/game/specs/BattleLog.spec.ts
index f148e14..b087a60 100644
--- a/src/scripts/game/specs/BattleLog.spec.ts
+++ b/src/scripts/game/specs/BattleLog.spec.ts
@@ -39,7 +39,7 @@ module SpaceTac.Game {
     describe("BattleLog", function () {
         it("forwards events to subscribers, until unsubscribe", function () {
             var log = new BattleLog();
-            var received = [];
+            var received: BaseLogEvent[] = [];
             var fake = new FakeEvent();
 
             var sub = log.subscribe(function (event) {
@@ -66,7 +66,7 @@ module SpaceTac.Game {
             checkEvent(battle.log.events[0], battle.play_order[0], "ship_change", battle.play_order[1]);
         });
 
-        it("can receive simulated initial state events", function (){
+        it("can receive simulated initial state events", function () {
             var battle = Battle.newQuickRandom();
 
             expect(battle.log.events.length).toBe(0);
diff --git a/src/scripts/view/battle/Arena.ts b/src/scripts/view/battle/Arena.ts
index bac4dd6..ea9a22b 100644
--- a/src/scripts/view/battle/Arena.ts
+++ b/src/scripts/view/battle/Arena.ts
@@ -30,7 +30,7 @@ module SpaceTac.View {
             });
 
             // Watch mouse move to capture hovering over background
-            this.input_callback = this.game.input.addMoveCallback((pointer) => {
+            this.input_callback = this.game.input.addMoveCallback((pointer: Phaser.Pointer) => {
                 var point = new Phaser.Point();
                 if (battleview.game.input.hitTest(background, pointer, point)) {
                     battleview.cursorInSpace(point.x * background.scale.x, point.y * background.scale.y);
diff --git a/src/scripts/view/battle/BattleView.ts b/src/scripts/view/battle/BattleView.ts
index ff16d3b..7a42cb9 100644
--- a/src/scripts/view/battle/BattleView.ts
+++ b/src/scripts/view/battle/BattleView.ts
@@ -33,7 +33,7 @@ module SpaceTac.View {
         log_processor: LogProcessor;
 
         // Init the view, binding it to a specific battle
-        init(player, battle) {
+        init(player: Game.Player, battle: Game.Battle) {
             this.player = player;
             this.battle = battle;
             this.targetting = null;
diff --git a/src/scripts/view/specs/Targetting.spec.ts b/src/scripts/view/specs/Targetting.spec.ts
index cd12c5f..fc3d252 100644
--- a/src/scripts/view/specs/Targetting.spec.ts
+++ b/src/scripts/view/specs/Targetting.spec.ts
@@ -5,8 +5,8 @@ module SpaceTac.View {
         it("broadcasts hovering and selection events", () => {
             var targetting = new Targetting(null);
 
-            var hovered = [];
-            var selected = [];
+            var hovered: Game.Target[] = [];
+            var selected: Game.Target[] = [];
             targetting.targetHovered.add((target: Game.Target) => {
                 hovered.push(target);
             });