diff --git a/lib/umbrellio_utils/semantic_logger/tiny_json_formatter.rb b/lib/umbrellio_utils/semantic_logger/tiny_json_formatter.rb
index 7733987..9e5395a 100644
--- a/lib/umbrellio_utils/semantic_logger/tiny_json_formatter.rb
+++ b/lib/umbrellio_utils/semantic_logger/tiny_json_formatter.rb
@@ -82,7 +82,7 @@ def pack_data(log)
       # Calculates MD5 fingerprint for the thread in which the log was made.
       # @return [String] truncated `MD5` hash.
       def thread_fingerprint_for(log)
-        Digest::MD5.hexdigest("#{log.thread_name}#{Process.pid}")[0...8]
+        "#{log.thread_name}-#{Process.pid}"
       end
 
       # Renders either exception or message of the log.