diff --git a/src/termui/table.go b/src/termui/table.go
index bb62eec..1455726 100644
--- a/src/termui/table.go
+++ b/src/termui/table.go
@@ -3,6 +3,7 @@ package termui
 import (
 	"image"
 	"strings"
+	"sync"
 
 	. "github.com/gizak/termui"
 )
@@ -11,6 +12,8 @@ import (
 type Table struct {
 	*Block
 
+	sync.Mutex
+
 	Header []string
 	Rows   [][]string
 
@@ -49,6 +52,8 @@ func (self *Table) ColResize() {
 
 // Buffer implements the Bufferer interface.
 func (self *Table) Draw(buf *Buffer) {
+	self.Lock()
+
 	self.Block.Draw(buf)
 
 	self.ColResizer()
@@ -124,6 +129,7 @@ func (self *Table) Draw(buf *Buffer) {
 			)
 		}
 	}
+	self.Unlock()
 }
 
 /////////////////////////////////////////////////////////////////////////////////
diff --git a/src/widgets/proc.go b/src/widgets/proc.go
index d4ba739..f3dc441 100644
--- a/src/widgets/proc.go
+++ b/src/widgets/proc.go
@@ -66,7 +66,9 @@ func NewProc() *Proc {
 	go func() {
 		ticker := time.NewTicker(self.interval)
 		for range ticker.C {
+			self.Lock()
 			self.update()
+			self.Unlock()
 		}
 	}()