diff --git a/client/client.go b/client/client.go
index 998629d9..4d7d8e53 100644
--- a/client/client.go
+++ b/client/client.go
@@ -194,7 +194,7 @@ func drainBody(b io.ReadCloser) (r1, r2 io.ReadCloser, err error) {
 // Do not use as a reliable way to get unique IDs, instead use for things like logging.
 func shortID() string {
 	b := make([]byte, 6)
-	if _, err := io.ReadFull(rand.Reader, b); err != nil {
+	if _, err := rand.Read(b); err != nil {
 		panic(err)
 	}
 	return base64.StdEncoding.EncodeToString(b)
diff --git a/error.go b/error.go
index 431e499e..20956ca9 100644
--- a/error.go
+++ b/error.go
@@ -33,7 +33,6 @@ import (
 	"crypto/rand"
 	"encoding/base64"
 	"fmt"
-	"io"
 	"strings"
 )
 
@@ -359,7 +358,7 @@ func asErrorResponse(err error) *ErrorResponse {
 // are not catastrophic.
 func newErrorID() string {
 	b := make([]byte, 6)
-	if _, err := io.ReadFull(rand.Reader, b); err != nil {
+	if _, err := rand.Read(b); err != nil {
 		panic(err)
 	}
 	return base64.StdEncoding.EncodeToString(b)
diff --git a/middleware/log_request.go b/middleware/log_request.go
index 46743157..d2ff99e5 100644
--- a/middleware/log_request.go
+++ b/middleware/log_request.go
@@ -5,7 +5,6 @@ import (
 	"crypto/rand"
 	"encoding/base64"
 	"encoding/json"
-	"io"
 	"net"
 	"net/http"
 	"sort"
@@ -112,7 +111,7 @@ func LogRequest(verbose bool, sensitiveHeaders ...string) goa.Middleware {
 // Do not use as a reliable way to get unique IDs, instead use for things like logging.
 func shortID() string {
 	b := make([]byte, 6)
-	if _, err := io.ReadFull(rand.Reader, b); err != nil {
+	if _, err := rand.Read(b); err != nil {
 		panic(err)
 	}
 	return base64.StdEncoding.EncodeToString(b)
diff --git a/middleware/request_id.go b/middleware/request_id.go
index fba69449..5d699a87 100644
--- a/middleware/request_id.go
+++ b/middleware/request_id.go
@@ -5,7 +5,6 @@ import (
 	"crypto/rand"
 	"encoding/base64"
 	"fmt"
-	"io"
 	"net/http"
 	"strings"
 	"sync/atomic"
@@ -34,7 +33,7 @@ func init() {
 	var b64 string
 	replacer := strings.NewReplacer("+", "", "/", "")
 	for len(b64) < 10 {
-		if _, err := io.ReadFull(rand.Reader, buf[:]); err != nil {
+		if _, err := rand.Read(buf[:]); err != nil {
 			panic(err)
 		}
 		b64 = base64.StdEncoding.EncodeToString(buf[:])
diff --git a/middleware/xray/middleware.go b/middleware/xray/middleware.go
index f833b994..f7db1500 100644
--- a/middleware/xray/middleware.go
+++ b/middleware/xray/middleware.go
@@ -4,7 +4,6 @@ import (
 	"context"
 	"crypto/rand"
 	"fmt"
-	"io"
 	"net"
 	"net/http"
 	"sync"
@@ -108,7 +107,7 @@ func New(service, daemon string) (goa.Middleware, error) {
 // compatible with AWS X-Ray.
 func NewID() string {
 	b := make([]byte, 8)
-	if _, err := io.ReadFull(rand.Reader, b); err != nil {
+	if _, err := rand.Read(b); err != nil {
 		panic(err)
 	}
 	return fmt.Sprintf("%x", b)
@@ -118,7 +117,7 @@ func NewID() string {
 // compatible with AWS X-Ray.
 func NewTraceID() string {
 	b := make([]byte, 12)
-	if _, err := io.ReadFull(rand.Reader, b); err != nil {
+	if _, err := rand.Read(b); err != nil {
 		panic(err)
 	}
 	return fmt.Sprintf("%d-%x-%s", 1, time.Now().Unix(), fmt.Sprintf("%x", b))