diff --git a/README.md b/README.md
index 3ab16ff..22be3db 100644
--- a/README.md
+++ b/README.md
@@ -136,6 +136,13 @@ Each file that is uploaded will be represented as a single object within the fil
 ```javascript
 url = data.filesUploaded[0].url
 ```
+
+For version `v3`, you can add following callbacks: `onOpen`, `onClose`, `onFileUploadFinished`, `onFileSelected`, `onUploadStarted`, to `pickerOptions`.
+
+```erb
+<%= filestack_picker_element 'button test', 'callbackForButton', id: 'someuniqueid', input_id: 'someuniqueinputid', pickerOptions: { onClose: 'callbackOnClose', onOpen: 'callbackOnOpen' } %>
+```
+
 ### Filestack Form Helper
 The form helper wraps the generic Pick element and adds the value of the returned file to an invisible text element, in order to attach to the form. It accepts the same options as the Pick element and renders the same button.
 
diff --git a/app/helpers/filestack_rails/application_helper.rb b/app/helpers/filestack_rails/application_helper.rb
index 7099478..ed5a5cf 100644
--- a/app/helpers/filestack_rails/application_helper.rb
+++ b/app/helpers/filestack_rails/application_helper.rb
@@ -50,6 +50,7 @@ def cname
 
     def create_javascript_for_picker(callback, options)
       client_name, _api_key = get_client_and_api_key
+      other_callbacks = build_callbacks_js(options) if options
       json_string = if options.nil?
                       ''
                     else
@@ -68,13 +69,23 @@ def create_javascript_for_picker(callback, options)
 
         <<~HTML
           (function(){
-            #{client_name}.picker({ onUploadDone: data => #{callback}(data), #{json_string} }).open()
+            #{client_name}.picker({ onUploadDone: data => #{callback}(data)#{other_callbacks}, #{json_string} }).open()
           })()
         HTML
       end
       get_filestack_js_result(v2: v2, v3: v3)
     end
 
+    def build_callbacks_js(options)
+      string = ""
+      string << ", onOpen: data => #{options.delete(:onOpen)}(data)" unless options[:onOpen].blank?
+      string << ", onClose: () => #{options.delete(:onClose)}()" unless options[:onClose].blank?
+      string << ", onFileUploadFinished: data => #{options.delete(:onFileUploadFinished)}(data)" unless options[:onFileUploadFinished].blank?
+      string << ", onFileSelected: data => #{options.delete(:onFileSelected)}(data)" unless options[:onFileSelected].blank?
+      string << ", onUploadStarted: data => #{options.delete(:onUploadStarted)}(data)" unless options[:onUploadStarted].blank?
+      string
+    end
+
     def get_client_and_api_key
       client_name = ::Rails.application.config.filestack_rails.client_name
       apikey = ::Rails.application.config.filestack_rails.api_key
diff --git a/spec/helpers/application_helper_spec.rb b/spec/helpers/application_helper_spec.rb
index cd4a5a1..e0324be 100644
--- a/spec/helpers/application_helper_spec.rb
+++ b/spec/helpers/application_helper_spec.rb
@@ -46,6 +46,12 @@
     end
   end
 
+  describe "#get_policy_and_signature" do
+    it "returns empty data" do
+      expect(get_policy_and_signature).to eq([nil, nil])
+    end
+  end
+
   describe "#get_policy_and_signature_string" do
     let(:signature) { "signature123" }
     let(:policy) { "policy321" }
@@ -80,4 +86,20 @@
       expect(security).to be(nil)
     end
   end
+
+  describe "#build_callbacks_js" do
+    expected_values = {
+      { onClose: 'callbackOnClose' } => ', onClose: () => callbackOnClose()',
+      { onOpen: 'callbackOnOpen' } => ', onOpen: data => callbackOnOpen(data)',
+      { onFileUploadFinished: 'callbackOnFileUploadFinished' } => ', onFileUploadFinished: data => callbackOnFileUploadFinished(data)',
+      { onFileSelected: 'callbackOnFileSelected' } => ', onFileSelected: data => callbackOnFileSelected(data)',
+      { onUploadStarted: 'callbackOnUploadStarted' } => ', onUploadStarted: data => callbackOnUploadStarted(data)'
+    }
+    expected_values.each do |val, expected|
+      it "returns correct string for #{val}" do
+        result = build_callbacks_js(val)
+        expect(result).to eq(expected)
+      end
+    end
+  end
 end