diff --git a/lambda/Cargo.lock b/lambda/Cargo.lock
index 844ec66..af051d2 100644
--- a/lambda/Cargo.lock
+++ b/lambda/Cargo.lock
@@ -629,9 +629,9 @@ dependencies = [
 
 [[package]]
 name = "icalendar"
-version = "0.16.17"
+version = "0.17.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "48c81bcf05f183477037d33785dd7670d32170b7e96270a9e475c8adee0140a0"
+checksum = "cc3b69b799a03e059f6dc984c25a8bf847d8ca4cbddb079c39ede7b3d24854c3"
 dependencies = [
  "chrono",
  "iso8601",
diff --git a/lambda/Cargo.toml b/lambda/Cargo.toml
index 29f2c7b..9a7753f 100644
--- a/lambda/Cargo.toml
+++ b/lambda/Cargo.toml
@@ -8,7 +8,7 @@ anyhow = "1.0.97"
 chrono = { version = "0.4.40", features = ["serde"] }
 chrono-tz = { version = "0.10.3", features = ["filter-by-regex"] }
 http = "1.1.0"
-icalendar = { version = "0.16.13", features = ["parser", "serde"] }
+icalendar = { version = "0.17.0", features = ["parser", "serde"] }
 itertools = "0.14"
 lambda_http = { version = "0.15", default-features = false, features = [
     "apigw_rest",