diff --git a/rocrate_validator/profiles/five-safes-crate/3_timestamp_format.ttl b/rocrate_validator/profiles/five-safes-crate/3_timestamp_format.ttl
index 64055a033..995c215ca 100644
--- a/rocrate_validator/profiles/five-safes-crate/3_timestamp_format.ttl
+++ b/rocrate_validator/profiles/five-safes-crate/3_timestamp_format.ttl
@@ -40,7 +40,7 @@ five-safes-crate:TimeStampFormat
         sh:description "End timestamps MUST follow the RFC 3339 standard." ;
         sh:path schema:endTime ;
         sh:minCount 0 ;
-        sh:pattern "^[0-9]{4}-[0-9]{2}-[0-9]{2}[Tt][0-9]{2}:[0-9]{2}:[0-9]{2}([.|,][0-9]+)?(Z|z|[+-][0-9]{2}:[0-9]{2})$" ;
+        sh:pattern "^[0-9]{4}-[0-9]{2}-[0-9]{2}[Tt][0-9]{2}:[0-9]{2}:[0-9]{2}([.,][0-9]+)?(Z|z|[+-][0-9]{2}:[0-9]{2})$" ;
         sh:severity sh:Violation ;
         sh:message "All `startTime` and `endTime` values MUST follow the RFC 3339 standard (YYYY-MM-DD'T'hh:mm:ss[.fraction](Z | ±hh:mm))." ;
     ] ;
@@ -50,7 +50,7 @@ five-safes-crate:TimeStampFormat
         sh:description "Start timestamps MUST follow the RFC 3339 standard." ;
         sh:path schema:startTime ;
         sh:minCount 0 ;
-        sh:pattern "^[0-9]{4}-[0-9]{2}-[0-9]{2}[Tt][0-9]{2}:[0-9]{2}:[0-9]{2}([.|,][0-9]+)?(Z|z|[+-][0-9]{2}:[0-9]{2})$" ;
+        sh:pattern "^[0-9]{4}-[0-9]{2}-[0-9]{2}[Tt][0-9]{2}:[0-9]{2}:[0-9]{2}([.,][0-9]+)?(Z|z|[+-][0-9]{2}:[0-9]{2})$" ;
         sh:severity sh:Violation ;
         sh:message "All `startTime` and `endTime` values MUST follow the RFC 3339 standard (YYYY-MM-DD'T'hh:mm:ss[.fraction](Z | ±hh:mm))." ;
     ] .
@@ -61,4 +61,4 @@ five-safes-crate:TimeStampFormat
 
 
 #=== MAY shapes ===#
-# (none)
\ No newline at end of file
+# (none)