diff --git a/schematicexport.py b/schematicexport.py
index 00b67e5..ecec273 100644
--- a/schematicexport.py
+++ b/schematicexport.py
@@ -207,10 +207,8 @@ def _update_schematic8(self, path):
         with open(path, encoding="utf-8") as f:
             lines = f.readlines()
 
-        if os.path.exists(path + "_old"):
-            os.remove(path + "_old")
-        os.rename(path, path + "_old")
         partSection = False
+        files_seen = set()  # keeps sheet files already processed.
 
         for i in range(0, len(lines) - 1):
             inLine = lines[i].rstrip()
@@ -231,7 +229,7 @@ def _update_schematic8(self, path):
                     value = m.group(2)
                     lastLcsc = value
                     if newLcsc not in (lastLcsc, ""):
-                        self.logger.info("Updating %s on %s", newLcsc, lastRef)
+                        self.logger.info("Updating %s on %s in %s", newLcsc, lastRef, path)
                         outLine = outLine.replace(
                             '"' + lastLcsc + '"', '"' + newLcsc + '"'
                         )
@@ -246,6 +244,12 @@ def _update_schematic8(self, path):
                         if value == part[0]:
                             newLcsc = part[3]
                             break
+                if key == "Sheetfile":
+                    file_name = m.group(2)
+                    if file_name not in files_seen:
+                        files_seen.add(file_name)
+                        dir_name = os.path.dirname(path)
+                        self._update_schematic8(os.path.join(dir_name, file_name))
             # if we hit the pin section without finding a LCSC property, add it
             m3 = pinRx.search(inLine)
             if m3 and partSection:
@@ -264,6 +268,9 @@ def _update_schematic8(self, path):
                 lastRef = ""
             newlines.append(outLine)
         newlines.append(lines[len(lines) - 1].rstrip())
+        if os.path.exists(path + "_old"):
+            os.remove(path + "_old")
+        os.rename(path, path + "_old")
         with open(path, "w", encoding="utf-8") as f:
             for line in newlines:
                 f.write(line + "\n")