diff --git a/README.md b/README.md
index 6e7a883..2449cda 100644
--- a/README.md
+++ b/README.md
@@ -61,7 +61,7 @@ The client customer ID is the account number of the AdWords client account you w
 ```
 Type:           string
 Valid Values:   <version>
-Default:        v201705
+Default:        v201708
 ```
 Version of the Adwords API to use.
 
diff --git a/driver.go b/driver.go
index a50e703..450e2fd 100644
--- a/driver.go
+++ b/driver.go
@@ -11,7 +11,7 @@ import (
 
 // Data source name.
 const (
-	APIVersion = "v201705"
+	APIVersion = "v201708"
 	DsnSep     = "|"
 	DsnOptSep  = ":"
 )