diff --git a/pyproject.toml b/pyproject.toml
index f4c9bda..f253140 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -28,7 +28,7 @@ allow-direct-references = true
 
 
 dependencies = [
-    "psycopg2-binary>=2.9,<3.0",
+    "psycopg2-binary==2.9.9",
     "dbt-adapters @ git+https://github.com/dbt-labs/dbt-adapters.git@ADAP-207/get_show_sql_has_no_wrapping",
     # add dbt-core to ensure backwards compatibility of installation, this is not a functional dependency
     "dbt-core>=1.8.0a1",
@@ -59,7 +59,7 @@ path = "dbt/adapters/postgres/__version__.py"
 
 [tool.hatch.envs.default]
 dependencies = [
-    "psycopg2-binary>=2.9,<3.0",
+    "psycopg2-binary==2.9.9",
     "dbt-adapters @ git+https://github.com/dbt-labs/dbt-adapters.git@ADAP-207/get_show_sql_has_no_wrapping",
     "dbt-common @ git+https://github.com/dbt-labs/dbt-common.git",
     'pre-commit==3.7.0;python_version>="3.9"',
@@ -77,7 +77,7 @@ docker-prod = "docker build -f docker/Dockerfile -t dbt-postgres ."
 
 [tool.hatch.envs.unit-tests]
 dependencies = [
-    "psycopg2-binary>=2.9,<3.0",
+    "psycopg2-binary==2.9.9",
     "dbt-adapters @ git+https://github.com/dbt-labs/dbt-adapters.git@ADAP-207/get_show_sql_has_no_wrapping",
     "dbt-common @ git+https://github.com/dbt-labs/dbt-common.git",
     "dbt-core @ git+https://github.com/dbt-labs/dbt-core.git#subdirectory=core",