diff --git a/Cargo.lock b/Cargo.lock
index 9ba66b1ea..a3df9c6fc 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1401,8 +1401,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "be4136b2a15dd319360be1c07d9933517ccf0be8f16bf62a3bee4f0d618df427"
 dependencies = [
  "cfg-if 1.0.0",
+ "js-sys",
  "libc",
  "wasi 0.11.0+wasi-snapshot-preview1",
+ "wasm-bindgen",
 ]
 
 [[package]]
@@ -1571,11 +1573,13 @@ dependencies = [
 
 [[package]]
 name = "icalendar"
-version = "0.10.0"
+version = "0.15.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a9ef924cc883333ecdc23b8c4a677119ec6a2db9ef7748a2ae74e77c91ef14df"
+checksum = "85aad69a5625006d09c694c0cd811f3655363444e692b2a9ce410c712ec1ff96"
 dependencies = [
  "chrono",
+ "iso8601",
+ "nom",
  "uuid",
 ]
 
@@ -1680,6 +1684,15 @@ dependencies = [
  "once_cell",
 ]
 
+[[package]]
+name = "iso8601"
+version = "0.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "924e5d73ea28f59011fec52a0d12185d496a9b075d360657aed2a5707f701153"
+dependencies = [
+ "nom",
+]
+
 [[package]]
 name = "itertools"
 version = "0.11.0"
@@ -1889,6 +1902,12 @@ dependencies = [
  "unicase",
 ]
 
+[[package]]
+name = "minimal-lexical"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "68354c5c6bd36d73ff3feceb05efa59b6acb7626617f4962be322a825e61f79a"
+
 [[package]]
 name = "miniz_oxide"
 version = "0.7.1"
@@ -1983,6 +2002,16 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "nom"
+version = "7.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d273983c5a657a70a3e8f2a01329822f3b8c8172b73826411a55751e404a0a4a"
+dependencies = [
+ "memchr",
+ "minimal-lexical",
+]
+
 [[package]]
 name = "num-traits"
 version = "0.2.17"
@@ -3354,11 +3383,12 @@ checksum = "711b9620af191e0cdc7468a8d14e709c3dcdb115b36f838e601583af800a370a"
 
 [[package]]
 name = "uuid"
-version = "0.8.2"
+version = "1.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bc5cf98d8186244414c848017f0e2676b3fcb46807f6668a97dfe67359a3c4b7"
+checksum = "88ad59a7560b41a70d191093a945f0b87bc1deeda46fb237479708a1d6b6cdfc"
 dependencies = [
  "getrandom 0.2.10",
+ "wasm-bindgen",
 ]
 
 [[package]]
diff --git a/Cargo.toml b/Cargo.toml
index d64a45cfa..da1e38244 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -58,7 +58,7 @@ actix-web = { version = "3", optional = true }
 actix-files = { version = "0.6", optional = true }
 
 bill = { version = "0.4", features = ["serialization"] }
-icalendar = "0.10"
+icalendar = "0.15"
 
 slug = "0.1"
 tempdir = "0.3"
diff --git a/src/project/spec_yaml.rs b/src/project/spec_yaml.rs
index 15370ba7e..9c14cfc4b 100644
--- a/src/project/spec_yaml.rs
+++ b/src/project/spec_yaml.rs
@@ -2,7 +2,7 @@ use std::str::FromStr;
 
 use anyhow::bail;
 use bill::{Bill, Currency, Tax};
-use icalendar::{Calendar, Component, Event as CalEvent};
+use icalendar::{Calendar, Component, Event as CalEvent, EventLike as _};
 use yaml_rust::Yaml;
 
 use super::{
@@ -80,10 +80,10 @@ impl HasEvents for Project {
                     }
 
                     if let Some(end) = event.end {
-                        cal_event.start_date(event.begin);
-                        cal_event.end_date(end);
+                        cal_event.starts(event.begin);
+                        cal_event.ends(end);
                     } else {
-                        cal_event.all_day(event.begin);
+                        cal_event.all_day(event.begin.naive_local());
                     }
 
                     cal_event.summary(self.name().unwrap_or("unnamed"));