diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6fcbaf3..b5c6cac 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## v1.3.1 - 2025-02-06
+
+- Relaxed the `gleam_http` constraint to permit v4.
+
 ## v1.3.0 - 2024-12-07
 
 - Updated for `gleam_stdlib` v0.45.0.
diff --git a/gleam.toml b/gleam.toml
index b8fca9e..e68e18e 100644
--- a/gleam.toml
+++ b/gleam.toml
@@ -1,5 +1,5 @@
 name = "gleam_hackney"
-version = "1.3.0"
+version = "1.3.1"
 gleam = ">= 1.0.0"
 
 description = "Gleam bindings to the Hackney HTTP client"
@@ -12,9 +12,9 @@ links = [
 ]
 
 [dependencies]
-gleam_stdlib = "~> 0.45"
-gleam_http = "~> 3.0"
-hackney = "~> 1.18"
+gleam_stdlib = ">= 0.45.0 and < 2.0.0"
+gleam_http = ">= 3.0.0 and < 5.0.0"
+hackney = ">= 1.18.0 and < 2.0.0"
 
 [dev-dependencies]
-gleeunit = "~> 1.0"
+gleeunit = ">= 1.0.0 and < 2.0.0"
diff --git a/manifest.toml b/manifest.toml
index 20ee8b4..d8d1367 100644
--- a/manifest.toml
+++ b/manifest.toml
@@ -3,9 +3,9 @@
 
 packages = [
   { name = "certifi", version = "2.12.0", build_tools = ["rebar3"], requirements = [], otp_app = "certifi", source = "hex", outer_checksum = "EE68D85DF22E554040CDB4BE100F33873AC6051387BAF6A8F6CE82272340FF1C" },
-  { name = "gleam_http", version = "3.7.1", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleam_http", source = "hex", outer_checksum = "A9EE0722106FCCAB8AD3BF9D0A3EFF92BFE8561D59B83BAE96EB0BE1938D4E0F" },
-  { name = "gleam_stdlib", version = "0.45.0", build_tools = ["gleam"], requirements = [], otp_app = "gleam_stdlib", source = "hex", outer_checksum = "206FCE1A76974AECFC55AEBCD0217D59EDE4E408C016E2CFCCC8FF51278F186E" },
-  { name = "gleeunit", version = "1.2.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleeunit", source = "hex", outer_checksum = "F7A7228925D3EE7D0813C922E062BFD6D7E9310F0BEE585D3A42F3307E3CFD13" },
+  { name = "gleam_http", version = "4.0.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleam_http", source = "hex", outer_checksum = "0A62451FC85B98062E0907659D92E6A89F5F3C0FBE4AB8046C99936BF6F91DBC" },
+  { name = "gleam_stdlib", version = "0.54.0", build_tools = ["gleam"], requirements = [], otp_app = "gleam_stdlib", source = "hex", outer_checksum = "723BA61A2BAE8D67406E59DD88CEA1B3C3F266FC8D70F64BE9FEC81B4505B927" },
+  { name = "gleeunit", version = "1.3.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleeunit", source = "hex", outer_checksum = "0E6C83834BA65EDCAAF4FE4FB94AC697D9262D83E6F58A750D63C9F6C8A9D9FF" },
   { name = "hackney", version = "1.20.1", build_tools = ["rebar3"], requirements = ["certifi", "idna", "metrics", "mimerl", "parse_trans", "ssl_verify_fun", "unicode_util_compat"], otp_app = "hackney", source = "hex", outer_checksum = "FE9094E5F1A2A2C0A7D10918FEE36BFEC0EC2A979994CFF8CFE8058CD9AF38E3" },
   { name = "idna", version = "6.1.1", build_tools = ["rebar3"], requirements = ["unicode_util_compat"], otp_app = "idna", source = "hex", outer_checksum = "92376EB7894412ED19AC475E4A86F7B413C1B9FBB5BD16DCCD57934157944CEA" },
   { name = "metrics", version = "1.0.1", build_tools = ["rebar3"], requirements = [], otp_app = "metrics", source = "hex", outer_checksum = "69B09ADDDC4F74A40716AE54D140F93BEB0FB8978D8636EADED0C31B6F099F16" },
@@ -16,7 +16,7 @@ packages = [
 ]
 
 [requirements]
-gleam_http = { version = "~> 3.0" }
-gleam_stdlib = { version = "~> 0.45" }
-gleeunit = { version = "~> 1.0" }
-hackney = { version = "~> 1.18" }
+gleam_http = { version = ">= 3.0.0 and < 5.0.0" }
+gleam_stdlib = { version = ">= 0.45.0 and < 2.0.0" }
+gleeunit = { version = ">= 1.0.0 and < 2.0.0" }
+hackney = { version = ">= 1.18.0 and < 2.0.0" }