diff --git a/theme.py b/theme.py
index b22a628cd..be5853b9a 100644
--- a/theme.py
+++ b/theme.py
@@ -1131,9 +1131,9 @@ def setThemeIndymediaModern(baseDir: str):
 def setThemeSolidaric(baseDir: str):
     name = 'solidaric'
     themeParams = {
-        "post-line-margin": "0 49.5%",
-        "post-line-width": "5px",
-        "post-line-radius": "10px",
+        "border-width-header": "0",
+        "post-line-margin": "0 5%",
+        "post-line-width": "1px",
         "column-left-header-line-color": "#999",
         "border-width": "0",
         "banner-height": "35vh",