diff --git a/app/build.gradle b/app/build.gradle
index c6f2914f5..cb5c04df9 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -62,7 +62,7 @@ dependencies {
     implementation 'androidx.multidex:multidex:2.0.1'
     implementation 'androidx.constraintlayout:constraintlayout:2.0.0-beta2'
 
-    kapt 'androidx.room:room-compiler:2.0.0'
-    implementation 'androidx.room:room-runtime:2.0.0'
-    annotationProcessor 'androidx.room:room-compiler:2.0.0'
+    kapt 'androidx.room:room-compiler:2.1.0'
+    implementation 'androidx.room:room-runtime:2.1.0'
+    annotationProcessor 'androidx.room:room-compiler:2.1.0'
 }
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/Converters.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/Converters.kt
index 3ff78610d..45de469a6 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/Converters.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/Converters.kt
@@ -9,7 +9,15 @@ class Converters {
     private val stringType = object : TypeToken<List<String>>() {}.type
 
     @TypeConverter
-    fun jsonToStringList(value: String) = gson.fromJson<ArrayList<String>>(value, stringType)
+    fun jsonToStringList(value: String): ArrayList<String> {
+        val newValue = if (value.isNotEmpty() && !value.startsWith("[")) {
+            "[$value]"
+        } else {
+            value
+        }
+
+        return gson.fromJson(newValue, stringType)
+    }
 
     @TypeConverter
     fun stringListToJson(list: ArrayList<String>) = gson.toJson(list)
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/EventsHelper.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/EventsHelper.kt
index 3f488321e..356d9b660 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/EventsHelper.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/EventsHelper.kt
@@ -214,7 +214,8 @@ class EventsHelper(val context: Context) {
             var repetitionExceptions = parentEvent.repetitionExceptions
             repetitionExceptions.add(Formatter.getDayCodeFromTS(occurrenceTS))
             repetitionExceptions = repetitionExceptions.distinct().toMutableList() as ArrayList<String>
-            eventsDB.updateEventRepetitionExceptions(repetitionExceptions, parentEventId)
+
+            eventsDB.updateEventRepetitionExceptions(repetitionExceptions.toString(), parentEventId)
             context.scheduleNextEventReminder(parentEvent, false)
 
             if (addToCalDAV && config.caldavSync) {
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/interfaces/EventsDao.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/interfaces/EventsDao.kt
index 0c6749744..5a06904ce 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/interfaces/EventsDao.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/interfaces/EventsDao.kt
@@ -103,7 +103,7 @@ interface EventsDao {
     fun updateEventRepetitionLimit(repeatLimit: Long, id: Long)
 
     @Query("UPDATE events SET repetition_exceptions = :repetitionExceptions WHERE id = :id")
-    fun updateEventRepetitionExceptions(repetitionExceptions: ArrayList<String>, id: Long)
+    fun updateEventRepetitionExceptions(repetitionExceptions: String, id: Long)
 
     @Insert(onConflict = OnConflictStrategy.REPLACE)
     fun insertOrUpdate(event: Event): Long