diff --git a/spid_compliant_certificates/__init__.py b/spid_compliant_certificates/__init__.py
index aa35173..c930795 100644
--- a/spid_compliant_certificates/__init__.py
+++ b/spid_compliant_certificates/__init__.py
@@ -28,7 +28,7 @@
 _min = 5
 
 # micro version
-_mic = 4
+_mic = 5
 
 # release level (alpha, beta, rc, final)
 _rel = 'final'
diff --git a/spid_compliant_certificates/validator/checks/subject_dn.py b/spid_compliant_certificates/validator/checks/subject_dn.py
index d8ac9e5..1f128a4 100644
--- a/spid_compliant_certificates/validator/checks/subject_dn.py
+++ b/spid_compliant_certificates/validator/checks/subject_dn.py
@@ -52,7 +52,7 @@
     x509.OID_SURNAME,
 ]
 
-PUB_SECTOR_PATTERN = r'^PA:IT-\S{1,11}$'
+PUB_SECTOR_PATTERN = r'^PA:IT-\S{1,16}$'
 PRI_SECTOR_PATTERN = r'^(CF:IT-[a-zA-Z0-9]{16}|VATIT-\d{11})$'