diff --git a/builtin/providers/postgresql/resource_postgresql_extension.go b/builtin/providers/postgresql/resource_postgresql_extension.go
index 37df80918..240de3eb3 100644
--- a/builtin/providers/postgresql/resource_postgresql_extension.go
+++ b/builtin/providers/postgresql/resource_postgresql_extension.go
@@ -13,8 +13,9 @@ import (
 )
 
 const (
-	extNameAttr   = "name"
-	extSchemaAttr = "schema"
+	extNameAttr    = "name"
+	extSchemaAttr  = "schema"
+	extVersionAttr = "version"
 )
 
 func resourcePostgreSQLExtension() *schema.Resource {
@@ -39,6 +40,12 @@ func resourcePostgreSQLExtension() *schema.Resource {
 				Computed:    true,
 				Description: "Sets the schema of an extension",
 			},
+			extVersionAttr: {
+				Type:        schema.TypeString,
+				Optional:    true,
+				Computed:    true,
+				Description: "Sets the version number of the extension",
+			},
 		},
 	}
 }
@@ -60,6 +67,10 @@ func resourcePostgreSQLExtensionCreate(d *schema.ResourceData, meta interface{})
 		fmt.Fprint(b, " SCHEMA ", pq.QuoteIdentifier(v.(string)))
 	}
 
+	if v, ok := d.GetOk(extVersionAttr); ok {
+		fmt.Fprint(b, " VERSION ", pq.QuoteIdentifier(v.(string)))
+	}
+
 	query := b.String()
 	_, err = conn.Query(query)
 	if err != nil {
@@ -80,8 +91,8 @@ func resourcePostgreSQLExtensionRead(d *schema.ResourceData, meta interface{}) e
 	defer conn.Close()
 
 	extID := d.Id()
-	var extName, extSchema string
-	err = conn.QueryRow("SELECT e.extname, n.nspname FROM pg_catalog.pg_extension e, pg_catalog.pg_namespace n WHERE n.oid = e.extnamespace AND e.extname = $1", extID).Scan(&extName, &extSchema)
+	var extName, extSchema, extVersion string
+	err = conn.QueryRow("SELECT e.extname, n.nspname, e.extversion FROM pg_catalog.pg_extension e, pg_catalog.pg_namespace n WHERE n.oid = e.extnamespace AND e.extname = $1", extID).Scan(&extName, &extSchema, &extVersion)
 	switch {
 	case err == sql.ErrNoRows:
 		log.Printf("[WARN] PostgreSQL extension (%s) not found", d.Id())
@@ -92,6 +103,7 @@ func resourcePostgreSQLExtensionRead(d *schema.ResourceData, meta interface{}) e
 	default:
 		d.Set(extNameAttr, extName)
 		d.Set(extSchemaAttr, extSchema)
+		d.Set(extVersionAttr, extVersion)
 		d.SetId(extName)
 		return nil
 	}
@@ -132,6 +144,10 @@ func resourcePostgreSQLExtensionUpdate(d *schema.ResourceData, meta interface{})
 		return err
 	}
 
+	if err := setExtVersion(conn, d); err != nil {
+		return err
+	}
+
 	return resourcePostgreSQLExtensionRead(d, meta)
 }
 
@@ -154,3 +170,27 @@ func setExtSchema(conn *sql.DB, d *schema.ResourceData) error {
 
 	return nil
 }
+
+func setExtVersion(conn *sql.DB, d *schema.ResourceData) error {
+	if !d.HasChange(extVersionAttr) {
+		return nil
+	}
+
+	extID := d.Id()
+
+	b := bytes.NewBufferString("ALTER EXTENSION ")
+	fmt.Fprintf(b, "%s UPDATE", pq.QuoteIdentifier(extID))
+
+	_, nraw := d.GetChange(extVersionAttr)
+	n := nraw.(string)
+	if n != "" {
+		fmt.Fprintf(b, " TO %s", pq.QuoteIdentifier(n))
+	}
+
+	query := b.String()
+	if _, err := conn.Query(query); err != nil {
+		return errwrap.Wrapf("Error updating extension version: {{err}}", err)
+	}
+
+	return nil
+}
diff --git a/builtin/providers/postgresql/resource_postgresql_extension_test.go b/builtin/providers/postgresql/resource_postgresql_extension_test.go
index a41a3496b..7deb71a39 100644
--- a/builtin/providers/postgresql/resource_postgresql_extension_test.go
+++ b/builtin/providers/postgresql/resource_postgresql_extension_test.go
@@ -21,6 +21,15 @@ func TestAccPostgresqlExtension_Basic(t *testing.T) {
 					testAccCheckPostgresqlExtensionExists("postgresql_extension.myextension"),
 					resource.TestCheckResourceAttr(
 						"postgresql_extension.myextension", "name", "pg_trgm"),
+					resource.TestCheckResourceAttr(
+						"postgresql_extension.myextension", "schema", "public"),
+
+					// NOTE(sean): Version 1.3 is what's
+					// shipped with PostgreSQL 9.6.1.  This
+					// version number may drift in the
+					// future.
+					resource.TestCheckResourceAttr(
+						"postgresql_extension.myextension", "version", "1.3"),
 				),
 			},
 		},