diff --git a/bakta/ips.py b/bakta/ips.py
index 4961b19c..d2973be5 100644
--- a/bakta/ips.py
+++ b/bakta/ips.py
@@ -27,7 +27,7 @@ def lookup(features):
         features_found = []
         features_not_found = []
         rec_futures = []
-        with sqlite3.connect(f"file:{cfg.db_path.joinpath('bakta.db')}?mode=ro", uri=True, check_same_thread=False) as conn:
+        with sqlite3.connect(f"file:{cfg.db_path.joinpath('bakta.db')}?mode=ro&nolock=1&cache=shared", uri=True, check_same_thread=False) as conn:
             conn.execute('PRAGMA omit_readlock;')
             conn.row_factory = sqlite3.Row
             with ThreadPoolExecutor(max_workers=max(10, cfg.threads)) as tpe:  # use min 10 threads for IO bound non-CPU lookups
diff --git a/bakta/psc.py b/bakta/psc.py
index 1ad7c127..d500861c 100644
--- a/bakta/psc.py
+++ b/bakta/psc.py
@@ -99,7 +99,7 @@ def lookup(features):
     no_psc_lookups = 0
     try:
         rec_futures = []
-        with sqlite3.connect(f"file:{cfg.db_path.joinpath('bakta.db')}?mode=ro", uri=True, check_same_thread=False) as conn:
+        with sqlite3.connect(f"file:{cfg.db_path.joinpath('bakta.db')}?mode=ro&nolock=1&cache=shared", uri=True, check_same_thread=False) as conn:
             conn.execute('PRAGMA omit_readlock;')
             conn.row_factory = sqlite3.Row
             with ThreadPoolExecutor(max_workers=max(10, cfg.threads)) as tpe:  # use min 10 threads for IO bound non-CPU lookups
diff --git a/bakta/pscc.py b/bakta/pscc.py
index 211d6d0b..0c586b98 100644
--- a/bakta/pscc.py
+++ b/bakta/pscc.py
@@ -22,7 +22,7 @@ def lookup(features):
     no_pscc_lookups = 0
     try:
         rec_futures = []
-        with sqlite3.connect(f"file:{cfg.db_path.joinpath('bakta.db')}?mode=ro", uri=True, check_same_thread=False) as conn:
+        with sqlite3.connect(f"file:{cfg.db_path.joinpath('bakta.db')}?mode=ro&nolock=1&cache=shared", uri=True, check_same_thread=False) as conn:
             conn.execute('PRAGMA omit_readlock;')
             conn.row_factory = sqlite3.Row
             with ThreadPoolExecutor(max_workers=max(10, cfg.threads)) as tpe:  # use min 10 threads for IO bound non-CPU lookups
diff --git a/bakta/ups.py b/bakta/ups.py
index 974ed6db..1600ca4c 100644
--- a/bakta/ups.py
+++ b/bakta/ups.py
@@ -26,7 +26,7 @@ def lookup(features):
         features_found = []
         features_not_found = []
         rec_futures = []
-        with sqlite3.connect(f"file:{cfg.db_path.joinpath('bakta.db')}?mode=ro", uri=True, check_same_thread=False) as conn:
+        with sqlite3.connect(f"file:{cfg.db_path.joinpath('bakta.db')}?mode=ro&nolock=1&cache=shared", uri=True, check_same_thread=False) as conn:
             conn.execute('PRAGMA omit_readlock;')
             conn.row_factory = sqlite3.Row
             with ThreadPoolExecutor(max_workers=max(10, cfg.threads)) as tpe:  # use min 10 threads for IO bound non-CPU lookups