diff --git a/Sources/App/CapServer.swift b/Sources/App/CapServer.swift
index 98b8561..f413b84 100644
--- a/Sources/App/CapServer.swift
+++ b/Sources/App/CapServer.swift
@@ -24,7 +24,11 @@ final class CapServer {
         get {
             do {
                 let content = try String(contentsOf: classifierVersionFile)
-                return Int(content) ?? 0
+                guard let value = Int(content) else {
+                    log("Invalid classifier version: \(content)")
+                    return 0
+                }
+                return value
             } catch {
                 log("Failed to read classifier version file: \(error)")
                 return 0
@@ -249,6 +253,7 @@ final class CapServer {
                 caps[cap]?.classifierVersion = version
             }
         }
+        log("Updated \(trainedCaps.count) classifier classes")
     }
     
     func save(classifier: Data, version: Int) throws {
@@ -259,5 +264,6 @@ final class CapServer {
             throw Abort(.internalServerError)
         }
         classifierVersion = version
+        log("Updated classifier to version \(version)")
     }
 }