diff --git a/src/plugins/DragDrop.js b/src/plugins/DragDrop.js
index 9353cabd3..936241b5c 100644
--- a/src/plugins/DragDrop.js
+++ b/src/plugins/DragDrop.js
@@ -1,3 +1,4 @@
+import TransloaditPlugin from './TransloaditPlugin';
 export default class DragDrop extends TransloaditPlugin {
   constructor(core, opts) {
     super(core, opts);
diff --git a/src/plugins/TransloaditBasic.js b/src/plugins/TransloaditBasic.js
index 52542942c..1ae4e8762 100644
--- a/src/plugins/TransloaditBasic.js
+++ b/src/plugins/TransloaditBasic.js
@@ -1,3 +1,4 @@
+import TransloaditPlugin from './TransloaditPlugin';
 class TransloaditBasic extends TransloaditPlugin {
   constructor(core, opts) {
     super(core, opts);
diff --git a/src/plugins/Tus10.js b/src/plugins/Tus10.js
index 172334673..e3fb44a83 100644
--- a/src/plugins/Tus10.js
+++ b/src/plugins/Tus10.js
@@ -1,3 +1,4 @@
+import TransloaditPlugin from './TransloaditPlugin';
 export default class Tus10 extends TransloaditPlugin {
   constructor(core, opts) {
     super(core, opts);