diff --git a/compose.yml b/compose.yml
index db90232..81b5bba 100644
--- a/compose.yml
+++ b/compose.yml
@@ -232,6 +232,12 @@ services:
               echo "[grampsweb]   patched JS paths: $$f"
             fi
           done
+          if [ -f /app/static/sw.js ]; then
+            sed -i "s|createHandlerBoundToURL(\"/index.html\")|createHandlerBoundToURL(\"$${SUBPATH}index.html\")|g" /app/static/sw.js
+            SUBPATH_BS=$$(echo "$$SUBPATH" | sed "s|/|\\\\\\\\/|g")
+            sed -i "s|\\^\\\\/api|\\^$${SUBPATH_BS}api|g" /app/static/sw.js
+            echo "[grampsweb]   patched sw.js navigation routes"
+          fi
           find /app/static -name '*.css' 2>/dev/null | while read f; do
             if grep -q '\.\./fonts/' "$$f" 2>/dev/null; then
               sed -i "s|'../fonts/|'fonts/|g" "$$f"
diff --git a/deploy-production/docker-compose.prod.yml b/deploy-production/docker-compose.prod.yml
index f6ee61d..32b6501 100644
--- a/deploy-production/docker-compose.prod.yml
+++ b/deploy-production/docker-compose.prod.yml
@@ -158,6 +158,12 @@ services:
               echo "[grampsweb]   patched JS paths: $$f"
             fi
           done
+          if [ -f /app/static/sw.js ]; then
+            sed -i "s|createHandlerBoundToURL(\"/index.html\")|createHandlerBoundToURL(\"$${SUBPATH}index.html\")|g" /app/static/sw.js
+            SUBPATH_BS=$$(echo "$$SUBPATH" | sed "s|/|\\\\\\\\/|g")
+            sed -i "s|\\^\\\\/api|\\^$${SUBPATH_BS}api|g" /app/static/sw.js
+            echo "[grampsweb]   patched sw.js navigation routes"
+          fi
           find /app/static -name '*.css' 2>/dev/null | while read f; do
             if grep -q '\.\./fonts/' "$$f" 2>/dev/null; then
               sed -i "s|'../fonts/|'fonts/|g" "$$f"