diff --git a/core-traits/Cargo.toml b/core-traits/Cargo.toml
index 069c5553..4151d410 100644
--- a/core-traits/Cargo.toml
+++ b/core-traits/Cargo.toml
@@ -11,7 +11,7 @@ path = "lib.rs"
 chrono = { version = "0.4", features = ["serde"] }
 enum-set = "0.0.8"
 lazy_static = "1.4.0"
-indexmap = "1"
+indexmap = "1.3.1"
 ordered-float = { version = "1.0.2", features = ["serde"] }
 uuid = { version = "0.8", features = ["v4", "serde"] }
 serde = { version = "1.0", features = ["rc"] }
diff --git a/core/Cargo.toml b/core/Cargo.toml
index 77976c8f..687547c9 100644
--- a/core/Cargo.toml
+++ b/core/Cargo.toml
@@ -7,7 +7,7 @@ workspace = ".."
 chrono = { version = "0.4", features = ["serde"] }
 enum-set = "0.0.8"
 failure = "0.1.1"
-indexmap = "1"
+indexmap = "1.3.1"
 ordered-float = { version = "1.0.2", features = ["serde"] }
 uuid = { version = "0.8", features = ["v4", "serde"] }
 
diff --git a/db/Cargo.toml b/db/Cargo.toml
index ceeaa314..4dffb3f6 100644
--- a/db/Cargo.toml
+++ b/db/Cargo.toml
@@ -10,7 +10,7 @@ syncable = ["serde", "serde_json", "serde_derive"]
 
 [dependencies]
 failure = "0.1.6"
-indexmap = "1"
+indexmap = "1.3.1"
 itertools = "0.8"
 lazy_static = "1.4.0"
 log = "0.4"
diff --git a/query-projector/Cargo.toml b/query-projector/Cargo.toml
index 37975ec2..2d65bcc9 100644
--- a/query-projector/Cargo.toml
+++ b/query-projector/Cargo.toml
@@ -8,7 +8,7 @@ sqlcipher = ["rusqlite/sqlcipher"]
 
 [dependencies]
 failure = "0.1.1"
-indexmap = "1"
+indexmap = "1.3.1"
 
 [dependencies.rusqlite]
 version = "0.21"