diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 488cfa2..98cfd48 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -4,7 +4,7 @@ compose = "1.12.1"
 composeMaterial3 = "1.9.0" # material3 is versioned independently of the Compose BOM
 coroutines = "1.11.0"
 # The published Speculum plugin API to compile against (release tag without "v").
-mirrorApi = "1.3.0"
+mirrorApi = "1.5.6"
 # Quality gates.
 ktlint = "14.2.0" # gradle plugin org.jlleitschuh.gradle.ktlint
 detekt = "1.23.8"