diff --git a/go.mod b/go.mod
index a6723d7..855be6a 100644
--- a/go.mod
+++ b/go.mod
@@ -7,7 +7,7 @@ require (
 	github.com/domodwyer/mailyak v3.1.1+incompatible
 	github.com/mattbaird/gochimp v0.0.0-20200820164431-f1082bcdf63f
 	github.com/mrz1836/go-ses v0.3.1
-	github.com/mrz1836/postmark v1.6.1
+	github.com/mrz1836/postmark v1.6.2
 )
 
 require (
diff --git a/go.sum b/go.sum
index ba305bd..f7b116e 100644
--- a/go.sum
+++ b/go.sum
@@ -21,8 +21,8 @@ github.com/mattbaird/gochimp v0.0.0-20200820164431-f1082bcdf63f h1:Sbn1gG/7kAsH2
 github.com/mattbaird/gochimp v0.0.0-20200820164431-f1082bcdf63f/go.mod h1:UaYd2gciRA1AoYEN6S+EiSNFK/0XHj9e1Wgloicgh6s=
 github.com/mrz1836/go-ses v0.3.1 h1:G1tqZYkzW1jpObeaP4YZrPVkJUq5P+Y2WdlStsfU1HI=
 github.com/mrz1836/go-ses v0.3.1/go.mod h1:xh4W5ebe4BILV7v8jXSnHi3mghJ0anGLvnPZEGTAG7w=
-github.com/mrz1836/postmark v1.6.1 h1:UHAs9WuZEBZj12MdZ/iVRyoC4tq3ODTdYhE17OhJeJ4=
-github.com/mrz1836/postmark v1.6.1/go.mod h1:6z5MxAH00Kj44owtQaryv9Pbqp5OKT3wWcRSydB0p0A=
+github.com/mrz1836/postmark v1.6.2 h1:QxKCwad4Nxlh81f4YQGXvyd5MF4dV1lgMTAKQZhqPME=
+github.com/mrz1836/postmark v1.6.2/go.mod h1:6z5MxAH00Kj44owtQaryv9Pbqp5OKT3wWcRSydB0p0A=
 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/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=