diff --git a/backend/src/data/entities/AllowedGuild.ts b/backend/src/data/entities/AllowedGuild.ts
index c8de9edd..129603ac 100644
--- a/backend/src/data/entities/AllowedGuild.ts
+++ b/backend/src/data/entities/AllowedGuild.ts
@@ -9,7 +9,7 @@ export class AllowedGuild {
   @Column()
   name: string;
 
-  @Column({ nullable: true })
+  @Column({ type: String, nullable: true })
   icon: string | null;
 
   @Column()
diff --git a/backend/src/data/entities/ArchiveEntry.ts b/backend/src/data/entities/ArchiveEntry.ts
index 7ab37bd6..639ef9bb 100644
--- a/backend/src/data/entities/ArchiveEntry.ts
+++ b/backend/src/data/entities/ArchiveEntry.ts
@@ -17,5 +17,5 @@ export class ArchiveEntry {
 
   @Column() created_at: string;
 
-  @Column({ nullable: true }) expires_at: string | null;
+  @Column({ type: String, nullable: true }) expires_at: string | null;
 }
diff --git a/backend/src/data/entities/Case.ts b/backend/src/data/entities/Case.ts
index 9972c5e9..f8980b33 100644
--- a/backend/src/data/entities/Case.ts
+++ b/backend/src/data/entities/Case.ts
@@ -13,27 +13,27 @@ export class Case {
 
   @Column() user_name: string;
 
-  @Column({ nullable: true }) mod_id: string | null;
+  @Column({ type: String, nullable: true }) mod_id: string | null;
 
-  @Column({ nullable: true }) mod_name: string | null;
+  @Column({ type: String, nullable: true }) mod_name: string | null;
 
   @Column() type: number;
 
-  @Column({ nullable: true }) audit_log_id: string | null;
+  @Column({ type: String, nullable: true }) audit_log_id: string | null;
 
   @Column() created_at: string;
 
   @Column() is_hidden: boolean;
 
-  @Column({ nullable: true }) pp_id: string | null;
+  @Column({ type: String, nullable: true }) pp_id: string | null;
 
-  @Column({ nullable: true }) pp_name: string | null;
+  @Column({ type: String, nullable: true }) pp_name: string | null;
 
   /**
    * ID of the channel and message where this case was logged.
    * Format: "channelid-messageid"
    */
-  @Column({ nullable: true }) log_message_id: string | null;
+  @Column({ type: String, nullable: true }) log_message_id: string | null;
 
   @OneToMany(
     type => CaseNote,
diff --git a/backend/src/data/entities/Mute.ts b/backend/src/data/entities/Mute.ts
index 0f72e5c0..4646645c 100644
--- a/backend/src/data/entities/Mute.ts
+++ b/backend/src/data/entities/Mute.ts
@@ -12,7 +12,7 @@ export class Mute {
 
   @Column() created_at: string;
 
-  @Column({ nullable: true }) expires_at: string | null;
+  @Column({ type: String, nullable: true }) expires_at: string | null;
 
   @Column() case_id: number;
 }
diff --git a/backend/src/data/entities/ScheduledPost.ts b/backend/src/data/entities/ScheduledPost.ts
index 30920658..0d136045 100644
--- a/backend/src/data/entities/ScheduledPost.ts
+++ b/backend/src/data/entities/ScheduledPost.ts
@@ -20,16 +20,16 @@ export class ScheduledPost {
 
   @Column("simple-json") attachments: Attachment[];
 
-  @Column({ nullable: true }) post_at: string | null;
+  @Column({ type: String, nullable: true }) post_at: string | null;
 
   /**
    * How often to post the message, in milliseconds
    */
-  @Column({ nullable: true }) repeat_interval: number | null;
+  @Column({ type: String, nullable: true }) repeat_interval: number | null;
 
-  @Column({ nullable: true }) repeat_until: string | null;
+  @Column({ type: String, nullable: true }) repeat_until: string | null;
 
-  @Column({ nullable: true }) repeat_times: number | null;
+  @Column({ type: String, nullable: true }) repeat_times: number | null;
 
   @Column() enable_mentions: boolean;
 }
diff --git a/backend/src/data/entities/Supporter.ts b/backend/src/data/entities/Supporter.ts
index bf09acbf..6d2b6432 100644
--- a/backend/src/data/entities/Supporter.ts
+++ b/backend/src/data/entities/Supporter.ts
@@ -9,6 +9,6 @@ export class Supporter {
   @Column()
   name: string;
 
-  @Column()
+  @Column({ type: String, nullable: true })
   amount: string | null;
 }