diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2c346691..937d65ef 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 > Committed but unreleased changes are put here, at the top. Older releases are detailed chronologically below. 
 
+
+#### Fixed
+- `nested-grid` - Fixed missing cell borders
+
 ## 2.21.23 (2024-09-02)
 
 #### Added
diff --git a/src/re_com/theme/default.cljs b/src/re_com/theme/default.cljs
index 93a3405f..e6396405 100644
--- a/src/re_com/theme/default.cljs
+++ b/src/re_com/theme/default.cljs
@@ -166,7 +166,8 @@
      :padding-right    sm-3
      :padding-left     sm-3
      :text-align :right
-     :border-right "thin solid #ccc"}))
+     :border-right "thin solid #ccc"
+     :border-bottom "thin solid #ccc"}))
 
 (defmethod main ::nested-grid/cell-wrapper
   [props {{:keys [edge value column-path]} :state}]
@@ -182,7 +183,9 @@
                                 (contains? edge :column-section-right)
                                 "thin solid #aaa"
                                 (contains? edge :right)
-                                "thin solid #aaa")
+                                "thin solid #aaa"
+                                :else
+                                "thin solid #ccc")
                :border-bottom (if (contains? edge :bottom)
                                 "thin solid #aaa"
                                 "thin solid #ccc")}))))