diff --git a/Deep-Verification-Base.md b/Deep-Verification-Base.md
index 3a57f81..93d819a 100644
--- a/Deep-Verification-Base.md
+++ b/Deep-Verification-Base.md
@@ -7,6 +7,7 @@ Updates:
 * [[2019-02-01 SPICE writer and more improvements|2019-02-01]]
 * [[2019-02-03 Implicit connection of nets with same label|2019-02-03]]
 * [[2019-02-05 Hierarchical merge and performance on a real testcase|2019-02-05]]
+* [[2019-02-17 Hierarchical DRC operations|2019-02-17]]
 
 # The problem