diff --git a/external-sop/src/main/kotlin/sop/external/operation/InlineVerifyExternal.kt b/external-sop/src/main/kotlin/sop/external/operation/InlineVerifyExternal.kt
index ed769e3..bf0c66b 100644
--- a/external-sop/src/main/kotlin/sop/external/operation/InlineVerifyExternal.kt
+++ b/external-sop/src/main/kotlin/sop/external/operation/InlineVerifyExternal.kt
@@ -62,9 +62,9 @@ class InlineVerifyExternal(
                     val verificationsOutIn = FileInputStream(verificationsOut)
                     val reader = BufferedReader(InputStreamReader(verificationsOutIn))
                     val verificationList: MutableList<Verification> = mutableListOf()
-                    var line: String
+                    var line: String?
                     while (reader.readLine().also { line = it } != null) {
-                        verificationList.add(fromString(line.trim()))
+                        verificationList.add(fromString(line!!.trim()))
                     }
 
                     return verificationList