diff --git a/Cargo.lock b/Cargo.lock
index 909f281cc..3c2a2c479 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1179,6 +1179,12 @@ version = "0.2.136"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "55edcf6c0bb319052dea84732cf99db461780fd5e8d3eb46ab6ff312ab31f197"
 
+[[package]]
+name = "libm"
+version = "0.2.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "348108ab3fba42ec82ff6e9564fc4ca0247bdccdc68dd8af9764bbc79c3c8ffb"
+
 [[package]]
 name = "libsqlite3-sys"
 version = "0.25.0"
@@ -1333,6 +1339,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "578ede34cf02f8924ab9447f50c28075b4d3e5b269972345e7e0372b38c6cdcd"
 dependencies = [
  "autocfg",
+ "libm",
 ]
 
 [[package]]
@@ -1502,9 +1509,9 @@ dependencies = [
 
 [[package]]
 name = "proptest"
-version = "1.0.0"
+version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1e0d9cc07f18492d879586c92b485def06bc850da3118075cd45d50e9c95b0e5"
+checksum = "29f1b898011ce9595050a68e60f90bad083ff2987a695a42357134c8381fba70"
 dependencies = [
  "bit-set",
  "bitflags",
@@ -1518,6 +1525,7 @@ dependencies = [
  "regex-syntax",
  "rusty-fork",
  "tempfile",
+ "unarray",
 ]
 
 [[package]]
@@ -2324,6 +2332,12 @@ version = "1.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dcf81ac59edc17cc8697ff311e8f5ef2d99fcbd9817b34cec66f90b6c3dfd987"
 
+[[package]]
+name = "unarray"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eaea85b334db583fe3274d12b4cd1880032beab409c0d774be044d4480ab9a94"
+
 [[package]]
 name = "unicode-bidi"
 version = "0.3.8"
diff --git a/taskchampion/taskchampion/Cargo.toml b/taskchampion/taskchampion/Cargo.toml
index 74ede4cd3..5589bd648 100644
--- a/taskchampion/taskchampion/Cargo.toml
+++ b/taskchampion/taskchampion/Cargo.toml
@@ -27,7 +27,7 @@ byteorder = "1.0"
 ring = "0.16"
 
 [dev-dependencies]
-proptest = "^1.0.0"
+proptest = "^1.1.0"
 tempfile = "3"
 rstest = "0.16"
 pretty_assertions = "1"