diff --git a/core-bukkit/build.gradle.kts b/core-bukkit/build.gradle.kts
index 00bc0c7..51ae50c 100644
--- a/core-bukkit/build.gradle.kts
+++ b/core-bukkit/build.gradle.kts
@@ -30,6 +30,8 @@ dependencies {
     }
     // https://mvnrepository.com/artifact/org.quartz-scheduler/quartz
     api("org.quartz-scheduler:quartz:2.3.2") { isTransitive = false }
+    // https://mvnrepository.com/artifact/com.sun.mail/jakarta.mail
+    api("com.sun.mail:jakarta.mail:2.0.1")
 
     // https://www.spigotmc.org/resources/nbt-api.7939/
     implementation("de.tr7zw:item-nbt-api:2.12.2")
diff --git a/core-bungee/build.gradle.kts b/core-bungee/build.gradle.kts
index 4884ed7..863d91b 100644
--- a/core-bungee/build.gradle.kts
+++ b/core-bungee/build.gradle.kts
@@ -26,6 +26,8 @@ dependencies {
     }
     // https://mvnrepository.com/artifact/org.quartz-scheduler/quartz
     api("org.quartz-scheduler:quartz:2.3.2") { isTransitive = false }
+    // https://mvnrepository.com/artifact/com.sun.mail/jakarta.mail
+    api("com.sun.mail:jakarta.mail:2.0.1")
 
     implementation("com.zaxxer:HikariCP:4.0.3") { exclude(group = "org.slf4j") }
 
diff --git a/core-common/build.gradle.kts b/core-common/build.gradle.kts
index fc25f1b..74d9f66 100644
--- a/core-common/build.gradle.kts
+++ b/core-common/build.gradle.kts
@@ -19,6 +19,8 @@ dependencies {
         exclude(group = "org.slf4j")
     }
     compileOnlyApi("org.quartz-scheduler:quartz:2.3.2") { isTransitive = false }
+    // https://mvnrepository.com/artifact/com.sun.mail/jakarta.mail
+    compileOnlyApi("com.sun.mail:jakarta.mail:2.0.1")
 
     // https://mvnrepository.com/artifact/com.zaxxer/HikariCP
     compileOnly("com.zaxxer:HikariCP:4.0.3") { isTransitive = false }
diff --git a/core-velocity/build.gradle.kts b/core-velocity/build.gradle.kts
index d8f372f..c25c43e 100644
--- a/core-velocity/build.gradle.kts
+++ b/core-velocity/build.gradle.kts
@@ -15,6 +15,8 @@ dependencies {
     }
     // https://mvnrepository.com/artifact/org.quartz-scheduler/quartz
     api("org.quartz-scheduler:quartz:2.3.2") { isTransitive = false }
+    // https://mvnrepository.com/artifact/com.sun.mail/jakarta.mail
+    api("com.sun.mail:jakarta.mail:2.0.1")
 
     // https://mvnrepository.com/artifact/com.zaxxer/HikariCP
     implementation("com.zaxxer:HikariCP:5.1.0") { isTransitive = false }