diff --git a/altsrc/flag.go b/altsrc/flag.go
index db959493bc..606b57cec7 100644
--- a/altsrc/flag.go
+++ b/altsrc/flag.go
@@ -124,13 +124,14 @@ func (f *BoolFlag) ApplyInputSourceValue(cCtx *cli.Context, isc InputSourceConte
 	if f.set != nil && !cCtx.IsSet(f.Name) && !isEnvVarSet(f.EnvVars) && isc.isSet(f.BoolFlag.Name) {
 		value, err := isc.Bool(f.BoolFlag.Name)
 		if err != nil {
+			fmt.Println(err)
 			return err
 		}
-		if value {
-			for _, name := range f.Names() {
-				_ = f.set.Set(name, strconv.FormatBool(value))
-			}
+		for _, name := range f.Names() {
+			_ = f.set.Set(name, strconv.FormatBool(value))
 		}
+	} else {
+		fmt.Println("not fill")
 	}
 	return nil
 }
diff --git a/altsrc/json_command_test.go b/altsrc/json_command_test.go
index bd0022b1cd..297fc9aedc 100644
--- a/altsrc/json_command_test.go
+++ b/altsrc/json_command_test.go
@@ -11,7 +11,7 @@ import (
 
 const (
 	fileName   = "current.json"
-	simpleJSON = `{"test": 15}`
+	simpleJSON = `{"test": 15, "testb": false}`
 	nestedJSON = `{"top": {"test": 15}}`
 )
 
@@ -34,11 +34,16 @@ func TestCommandJSONFileTest(t *testing.T) {
 		Action: func(c *cli.Context) error {
 			val := c.Int("test")
 			expect(t, val, 15)
+
+			valb := c.Bool("testb")
+			expect(t, valb, false)
 			return nil
 		},
 		Flags: []cli.Flag{
 			NewIntFlag(&cli.IntFlag{Name: "test"}),
-			&cli.StringFlag{Name: "load"}},
+			&cli.StringFlag{Name: "load"},
+			NewBoolFlag(&cli.BoolFlag{Name: "testb", Value: true}),
+		},
 	}
 	command.Before = InitInputSourceWithContext(command.Flags, NewJSONSourceFromFlagFunc("load"))
 	err := command.Run(c)
diff --git a/go.mod b/go.mod
index 7fa4542cbc..09ef1477d8 100644
--- a/go.mod
+++ b/go.mod
@@ -9,4 +9,7 @@ require (
 	gopkg.in/yaml.v3 v3.0.1
 )
 
-require github.com/russross/blackfriday/v2 v2.1.0 // indirect
+require (
+	github.com/russross/blackfriday/v2 v2.1.0 // indirect
+	golang.org/x/text v0.3.7 // indirect
+)
diff --git a/go.sum b/go.sum
index 0756e415ce..96058c71de 100644
--- a/go.sum
+++ b/go.sum
@@ -6,6 +6,8 @@ github.com/russross/blackfriday/v2 v2.1.0 h1:JIOH55/0cWyOuilr9/qlrm0BSXldqnqwMsf
 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
 github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 h1:bAn7/zixMGCfxrRTfdpNzjtPYqr8smhKouy9mxVdGPU=
 github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673/go.mod h1:N3UwUGtsrSj3ccvlPHLoLsHnpR27oXr4ZE984MbSER8=
+golang.org/x/text v0.3.7 h1:olpwvP2KacW1ZWvsR7uQhoyTYvKAupfQrRGBFM352Gk=
+golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
diff --git a/godoc-current.txt b/godoc-current.txt
index 6d0a908753..78b12e0421 100644
--- a/godoc-current.txt
+++ b/godoc-current.txt
@@ -5,24 +5,24 @@ line Go applications. cli is designed to be easy to understand and write,
 the most simple cli application can be written as follows:
 
     func main() {
-      (&cli.App{}).Run(os.Args)
+    	(&cli.App{}).Run(os.Args)
     }
 
 Of course this application does not do much, so let's make this an actual
 application:
 
-      func main() {
-        app := &cli.App{
-    			 Name: "greet",
-    			 Usage: "say a greeting",
-    			 Action: func(c *cli.Context) error {
-    				 fmt.Println("Greetings")
-    				 return nil
-    			 },
-    		 }
-
-        app.Run(os.Args)
-      }
+    func main() {
+    	app := &cli.App{
+      		Name: "greet",
+      		Usage: "say a greeting",
+      		Action: func(c *cli.Context) error {
+      			fmt.Println("Greetings")
+      			return nil
+      		},
+    	}
+
+    	app.Run(os.Args)
+    }
 
 VARIABLES