diff --git a/build.gradle b/build.gradle
index 369082e02..58d8037b8 100644
--- a/build.gradle
+++ b/build.gradle
@@ -23,7 +23,7 @@ ext {
     pdfboxVersion = "3.0.5"
     imageioVersion = "3.12.0"
     lombokVersion = "1.18.38"
-    bouncycastleVersion = "1.80"
+    bouncycastleVersion = "1.81"
     springSecuritySamlVersion = "6.5.0"
     openSamlVersion = "4.3.2"
     commonmarkVersion = "0.24.0"
diff --git a/proprietary/build.gradle b/proprietary/build.gradle
index aff6559e9..686980c9d 100644
--- a/proprietary/build.gradle
+++ b/proprietary/build.gradle
@@ -19,7 +19,7 @@ dependencies {
     implementation 'com.bucket4j:bucket4j_jdk17-core:8.14.0'
 
     // https://mvnrepository.com/artifact/com.bucket4j/bucket4j_jdk17
-    implementation 'org.bouncycastle:bcprov-jdk18on:1.80'
+    implementation 'org.bouncycastle:bcprov-jdk18on:1.81'
 
     implementation 'org.thymeleaf.extras:thymeleaf-extras-springsecurity5:3.1.3.RELEASE'
     api 'io.micrometer:micrometer-registry-prometheus'