diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8223bb66f..35fe2a0ec 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,13 +1,24 @@
 # Changelog
 
+## v.0.21.2
+
+### Breaking Changes
+
+- `engine_name` has been renamed to `engine` please update your `profiles.yml` accordingly [#4](https://github.com/firebolt-db/dbt-firebolt/pull/4)
+### Features
+
+- added ability to specify an account for users who have more than one account associated with their credentials [#4](https://github.com/firebolt-db/dbt-firebolt/pull/4)
+### Fixes
+
+- fixed bug where database connection URL used backslashes on Windows due to `os.path.join` [#5](https://github.com/firebolt-db/dbt-firebolt/pull/5)
+
+
 ## v.0.21.1
 
 ### Fixes
 
 - removed log statements and an extra `firebolt__get_create_index_sql` macro error via [#2](https://github.com/firebolt-db/dbt-firebolt/pull/2)
 
-- added ability to specify an account for users who have more than one account associated with their credentials
-
 
 ## v.0.21.0
 
diff --git a/dbt/adapters/firebolt/__version__.py b/dbt/adapters/firebolt/__version__.py
index 3fd4981d4..c34baa9c7 100644
--- a/dbt/adapters/firebolt/__version__.py
+++ b/dbt/adapters/firebolt/__version__.py
@@ -1 +1 @@
-version = "0.21.1"
+version = "0.21.2"
diff --git a/dbt/adapters/firebolt/connections.py b/dbt/adapters/firebolt/connections.py
index 84343b153..ee67d1659 100644
--- a/dbt/adapters/firebolt/connections.py
+++ b/dbt/adapters/firebolt/connections.py
@@ -1,7 +1,7 @@
 from contextlib import contextmanager
 from dataclasses import dataclass
 from typing import Optional, Dict, List, Any, Iterable
-from urllib.parse import urlencode, quote
+from urllib.parse import quote, urlencode
 import os
 import json
 import agate
@@ -100,9 +100,17 @@ def open(cls, connection):
         return connection
 
     def make_jdbc_url(self, credentials):
-        jdbc_url = os.path.join("jdbc:firebolt://",
-                                credentials.host,
-                                credentials.database)
+        jdbc_url = f'jdbc:firebolt://{credentials.host}/{credentials.database}'
+        if credentials.params:
+            jdbc_url += "".join(
+                    map(
+                        lambda kv: "&"
+                        + urllib.parse.quote(kv[0])
+                        + "="
+                        + urllib.parse.quote(kv[1]),
+                        credentials.params.items(),
+                    )
+            )
         # For both engine name and account, if there's not a value specified
         # it uses whatever Firebolt has set as default for this DB. So just
         # fill in url variables that are not None.
@@ -112,9 +120,9 @@ def make_jdbc_url(self, credentials):
                    }
         # If params, then add them, too.
         if credentials.params:
-            url_vars.update({key:quote(credentials.params.items()[key]).lower()
-                             for key in credentials.params.items()
-                             if credentials.params.items()[key]
+            url_vars.update({key:quote(value).lower()
+                             for key, value in credentials.params.items()
+                             if value
                             })
         if url_vars:
             jdbc_url += "?" + urlencode(url_vars)
diff --git a/dev-requirements.txt b/dev-requirements.txt
index 749d783f5..3d1060981 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -1,4 +1,4 @@
 pytest~=0.6.2
 pytest-dbt-adapter==0.5.1
-dbt-core~=0.20.0
+dbt-core~=0.21.0
 .
\ No newline at end of file