diff --git a/README.md b/README.md
index 0f801f6..f0a440f 100644
--- a/README.md
+++ b/README.md
@@ -493,14 +493,14 @@ Guard::Jasmine supports coverage reports generated by [Istanbul](https://github.
 have `istanbul` in your path in order to make this feature work. You can install it with NPM
 
 ```ruby
-$ npm install istanbul
+$ npm install -g istanbul
 ```
 
 You also need to explicit enable the coverage support in the options:
 
 ```ruby
-:coverage => :true                            # Enable/disable JavaScript coverage support
-                                              # default: :false
+:coverage => true                             # Enable/disable JavaScript coverage support
+                                              # default: false
 ```
 
 ### Instrumentation
@@ -546,11 +546,11 @@ Guard::Jasmine always shows the Istanbul text report after a spec run that conta
 can also enable two more reports:
 
 ```ruby
-:coverage_html => :true                       # Enable Istanbul HTML coverage report
-                                              # default: :false
+:coverage_html => true                        # Enable Istanbul HTML coverage report
+                                              # default: false
 
-:coverage_summary => :true                    # Enable Istanbul summary coverage report
-                                              # default: :false
+:coverage_summary => true                     # Enable Istanbul summary coverage report
+                                              # default: false
 ```
 
 The `:coverage_summary` options disables the detailed file based coverage report by a small summary coverage report.