diff --git a/priv/spec/invalid.yml b/priv/spec/invalid.yml
index c1470a2..6a2870b 100644
--- a/priv/spec/invalid.yml
+++ b/priv/spec/invalid.yml
@@ -4,7 +4,7 @@
 # Each example contains an invalid TypeID string. Implementations are expected
 # to throw an error when attempting to parse/validate these strings.
 #
-# Last updated: 2023-06-29
+# Last updated: 2023-07-05
 
 - name: prefix-uppercase
   typeid: "PREFIX_00000000000000000000000000"
@@ -31,7 +31,7 @@
   description: "The prefix can't have any spaces"
 
 - name: prefix-64-chars
-  #          123456789 123456789 123456789 123456789 123456789 123456789 1234
+  #        123456789 123456789 123456789 123456789 123456789 123456789 1234
   typeid: "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijkl_00000000000000000000000000"
   description: "The prefix can't be 64 characters, it needs to be 63 characters or less"
 
@@ -81,3 +81,8 @@
   # This example would be valid if we were using the crockford hyphenation rules
   typeid: "prefix_123456789-0123456789-0123456"
   description: "The suffix can't ignore hyphens as in the crockford encoding"
+
+- name: suffix-overflow
+  # This is the first suffix that overflows into 129 bits
+  typeid: "prefix_8zzzzzzzzzzzzzzzzzzzzzzzzz"
+  description: "The should encode at most 128-bits"
diff --git a/priv/spec/valid.yml b/priv/spec/valid.yml
index cf31f0c..8f63250 100644
--- a/priv/spec/valid.yml
+++ b/priv/spec/valid.yml
@@ -23,7 +23,7 @@
 # note that not all of them are UUIDv7s. When *generating* new random typeids,
 # implementations should always use UUIDv7s.
 #
-# Last updated: 2023-06-29
+# Last updated: 2023-07-05
 
 - name: nil
   typeid: "00000000000000000000000000"
@@ -50,6 +50,11 @@
   prefix: ""
   uuid: "00000000-0000-0000-0000-000000000020"
 
+- name: max-valid
+  typeid: "7zzzzzzzzzzzzzzzzzzzzzzzzz"
+  prefix: ""
+  uuid: "ffffffff-ffff-ffff-ffff-ffffffffffff"
+
 - name: valid-alphabet
   typeid: "prefix_0123456789abcdefghjkmnpqrs"
   prefix: "prefix"
diff --git a/scripts/update_spec.sh b/scripts/update_spec.sh
new file mode 100755
index 0000000..0a7678c
--- /dev/null
+++ b/scripts/update_spec.sh
@@ -0,0 +1,4 @@
+#!/usr/bin/env bash -ex
+
+wget https://raw.githubusercontent.com/jetpack-io/typeid/main/spec/invalid.yml -O priv/spec/invalid.yml
+wget https://raw.githubusercontent.com/jetpack-io/typeid/main/spec/valid.yml -O priv/spec/valid.yml