diff --git a/blackmagic.go b/blackmagic.go
index c97eefd..8d1d468 100644
--- a/blackmagic.go
+++ b/blackmagic.go
@@ -1,9 +1,8 @@
 package blackmagic
 
 import (
+	"fmt"
 	"reflect"
-
-	"github.com/pkg/errors"
 )
 
 // AssignIfCompatible is a convenience function to safely
@@ -23,12 +22,12 @@ func AssignIfCompatible(dst, src interface{}) error {
 	case reflect.Slice:
 		isSlice = true
 	default:
-		return errors.Errorf("argument t to AssignIfCompatible must be a pointer or a slice: %T", src)
+		return fmt.Errorf("argument t to AssignIfCompatible must be a pointer or a slice: %T", src)
 	}
 
 	rv := reflect.ValueOf(dst)
 	if rv.Kind() != reflect.Ptr {
-		return errors.Errorf(`argument to AssignIfCompatible() must be a pointer: %T`, dst)
+		return fmt.Errorf(`argument to AssignIfCompatible() must be a pointer: %T`, dst)
 	}
 
 	actualDst := rv.Elem()
@@ -43,11 +42,11 @@ func AssignIfCompatible(dst, src interface{}) error {
 		}
 	}
 	if !result.Type().AssignableTo(actualDst.Type()) {
-		return errors.Errorf(`argument to AssignIfCompatible() must be compatible with %T (was %T)`, orv.Interface(), dst)
+		return fmt.Errorf(`argument to AssignIfCompatible() must be compatible with %T (was %T)`, orv.Interface(), dst)
 	}
 
 	if !actualDst.CanSet() {
-		return errors.Errorf(`argument to AssignIfCompatible() must be settable`)
+		return fmt.Errorf(`argument to AssignIfCompatible() must be settable`)
 	}
 	actualDst.Set(result)
 
diff --git a/blackmagic_test.go b/blackmagic_test.go
index 53ac302..413f523 100644
--- a/blackmagic_test.go
+++ b/blackmagic_test.go
@@ -37,6 +37,15 @@ func TestAssignment(t *testing.T) {
 				return &v
 			},
 		},
+		{
+			Name:  `lestrrat-go/jwx#389`,
+			Error: true,
+			Value: 
+			Destination: func() interface{} {
+				var s struct{}
+				return &s
+			},
+		},
 	}
 
 	for _, tc := range testcases {
diff --git a/go.mod b/go.mod
index 8248ac3..8837714 100644
--- a/go.mod
+++ b/go.mod
@@ -2,7 +2,4 @@ module github.com/lestrrat-go/blackmagic
 
 go 1.16
 
-require (
-	github.com/pkg/errors v0.9.1
-	github.com/stretchr/testify v1.7.0
-)
+require github.com/stretchr/testify v1.7.1
diff --git a/go.sum b/go.sum
index 22c86e5..307d5b4 100644
--- a/go.sum
+++ b/go.sum
@@ -1,12 +1,13 @@
 github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
-github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0 h1:4G4v2dO3VZwixGIRoQ5Lfboy6nUhCyYzaqnIAPPhYs4=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.7.1 h1:5TQK59W5E3v0r2duFAb7P95B6hEeOyEnHRa8MjYSMTY=
+github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 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 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=