diff --git a/contrib/backends/srndv2/src/srnd/model_mem.go b/contrib/backends/srndv2/src/srnd/model_mem.go
index 827d0ed..1ca0b5b 100644
--- a/contrib/backends/srndv2/src/srnd/model_mem.go
+++ b/contrib/backends/srndv2/src/srnd/model_mem.go
@@ -731,6 +731,10 @@ func (self *thread) HasOmittedImages() bool {
 	return self.truncatedImageCount > 0
 }
 
+func (self *thread) BumpLock() bool {
+	return len(self.Posts) >= BumpLimit
+}
+
 func (self *thread) Update(db Database) {
 	root := self.Posts[0].MessageID()
 	self.Posts = append([]PostModel{self.Posts[0]}, db.GetThreadReplyPostModels(self.prefix, root, 0, 0)...)
diff --git a/contrib/static/krane.css b/contrib/static/krane.css
index 29daef1..3a10531 100644
--- a/contrib/static/krane.css
+++ b/contrib/static/krane.css
@@ -528,3 +528,8 @@ background-repeat: repeat;
     font-weight: bold;
     margin-left: none;
 }
+
+.bumplock {
+    background: red;
+    filter: saturate(0.5);
+}
diff --git a/contrib/templates/placebo/board.mustache b/contrib/templates/placebo/board.mustache
index b5661c9..b53f6b9 100644
--- a/contrib/templates/placebo/board.mustache
+++ b/contrib/templates/placebo/board.mustache
@@ -41,8 +41,12 @@
         <br />
         {{{form}}}
         {{#board.Threads}}
-            {{#Truncate}}
+            {{#BumpLock}}
+            <div class="thread bumplock" id="thread_{{OP.PostHash}}"> 
+            {{^BumpLock}}
             <div class="thread" id="thread_{{OP.PostHash}}">
+            {{/BumpLock}}
+            {{#Truncate}}
                 {{{OP.RenderPost}}}
                 <div class="excluded">{{MissingPostCount}} posts excluded</div>
                 {{#Replies}}
diff --git a/contrib/templates/placebo/thread.mustache b/contrib/templates/placebo/thread.mustache
index 49f3545..cce0ed4 100644
--- a/contrib/templates/placebo/thread.mustache
+++ b/contrib/templates/placebo/thread.mustache
@@ -39,8 +39,11 @@
         <center><b><a href="{{thread.BoardURL}}">{{thread.Board}}</a></b></center>
         <br />
         {{{form}}}
-
+            {{#thread.BumpLock}}
+            <div class="thread bumplock" id="thread_{{thread.OP.PostHash}}"> 
+            {{^thread.BumpLock}}
             <div class="thread" id="thread_{{thread.OP.PostHash}}">
+            {{/thread.BumpLock}}
                 {{{thread.OP.RenderPost}}}
                 {{#thread.Replies}}
                     {{{RenderPost}}}
diff --git a/contrib/templates/placebo/ukko.mustache b/contrib/templates/placebo/ukko.mustache
index 002de02..cf08f7a 100644
--- a/contrib/templates/placebo/ukko.mustache
+++ b/contrib/templates/placebo/ukko.mustache
@@ -45,8 +45,12 @@
             {{/next}}
         </div>
         {{#threads}}
-            {{#Truncate}}
+            {{#BumpLock}}
+            <div class="thread bumplock" id="thread_{{OP.PostHash}}"> 
+            {{^BumpLock}}
             <div class="thread" id="thread_{{OP.PostHash}}">
+            {{/BumpLock}}
+            {{#Truncate}}
                 Posted on <a href="{{BoardURL}}">{{Board}}</a>
                 <br />
                 {{{OP.RenderTruncatedPost}}}