diff --git a/.palantir/go-version b/.palantir/go-version
index af929fac..03d7710a 100644
--- a/.palantir/go-version
+++ b/.palantir/go-version
@@ -1 +1 @@
-go1.19.6
\ No newline at end of file
+go1.20.6
\ No newline at end of file
diff --git a/conjure-go-verifier/ignored-test-cases.yml b/conjure-go-verifier/ignored-test-cases.yml
index 2f87410b..99fcad9b 100644
--- a/conjure-go-verifier/ignored-test-cases.yml
+++ b/conjure-go-verifier/ignored-test-cases.yml
@@ -32,8 +32,10 @@ client:
     receiveDateTimeAliasExample:
     # This is supposed to fail due to 10 zeros, but time.Parse accepts it.
     - '"2017-01-02T04:04:05.000000000+01:00[Europe/Berlin]"'
+    - '"2017-01-02T03:04:05.0000000000Z"'
     receiveDateTimeExample:
     - '{"value":"2017-01-02T04:04:05.000000000+01:00[Europe/Berlin]"}'
+    - '{"value":"2017-01-02T03:04:05.0000000000Z"}'
     receiveDoubleExample:
     - '{"value":"NaN"}'
     - '{"value":"Infinity"}'
diff --git a/go.mod b/go.mod
index a104f85d..96c52ae7 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/palantir/conjure-go/v6
 
-go 1.19
+go 1.20
 
 require (
 	github.com/dave/jennifer v1.4.2-0.20211112003305-45cc0b7eb71a