diff --git a/launcher/src/main.rs b/launcher/src/main.rs
index e45b83a3..8996fe8c 100644
--- a/launcher/src/main.rs
+++ b/launcher/src/main.rs
@@ -818,12 +818,14 @@ fn shard_manager(
 
     // Prefix caching
     if let Some(prefix_caching) = prefix_caching {
-        envs.push(("PREFIX_CACHING".into(), prefix_caching.to_string().into()));
+        let prefix_caching = if prefix_caching { "1" } else { "0" };
+        envs.push(("PREFIX_CACHING".into(), prefix_caching.into()));
     }
 
     // Chunked prefill
     if let Some(chunked_prefill) = chunked_prefill {
-        envs.push(("CHUNKED_PREFILL".into(), chunked_prefill.to_string().into()));
+        let chunked_prefill = if chunked_prefill { "1" } else { "0" };
+        envs.push(("CHUNKED_PREFILL".into(), chunked_prefill.into()));
     }
 
     // Compile max batch size and rank
diff --git a/server/lorax_server/utils/punica.py b/server/lorax_server/utils/punica.py
index fe5869e0..248359eb 100644
--- a/server/lorax_server/utils/punica.py
+++ b/server/lorax_server/utils/punica.py
@@ -20,14 +20,14 @@
 try:
     import punica_kernels as _kernels
 
-    HAS_SGMV = not bool(os.environ.get("DISABLE_SGMV", ""))
+    HAS_SGMV = not bool(int(os.environ.get("DISABLE_SGMV", "0")))
 except ImportError:
     warnings.warn("Could not import SGMV kernel from Punica, falling back to loop.")
     _kernels = None
     HAS_SGMV = False
 
 
-LORAX_PUNICA_TRITON_DISABLED = bool(os.environ.get("LORAX_PUNICA_TRITON_DISABLED", ""))
+LORAX_PUNICA_TRITON_DISABLED = bool(int(os.environ.get("LORAX_PUNICA_TRITON_DISABLED", "0")))
 if LORAX_PUNICA_TRITON_DISABLED:
     logger.info("LORAX_PUNICA_TRITON_DISABLED is set, disabling Punica Trion kernels.")
 
diff --git a/server/lorax_server/utils/sources/hub.py b/server/lorax_server/utils/sources/hub.py
index 536421d2..4a1d6a2f 100644
--- a/server/lorax_server/utils/sources/hub.py
+++ b/server/lorax_server/utils/sources/hub.py
@@ -274,7 +274,7 @@ def download_file(self, filename: str, ignore_errors: bool = False) -> Optional[
 
 
 def get_hub_api(token: Optional[str] = None) -> HfApi:
-    if token == "" and bool(os.environ.get("LORAX_USE_GLOBAL_HF_TOKEN", 0)):
+    if token == "" and bool(int(os.environ.get("LORAX_USE_GLOBAL_HF_TOKEN", "0"))):
         # User initialized LoRAX to fallback to global HF token if request token is empty
         token = os.environ.get("HUGGING_FACE_HUB_TOKEN")
     return HfApi(token=token)
diff --git a/server/lorax_server/utils/state.py b/server/lorax_server/utils/state.py
index 5566208b..d1771654 100644
--- a/server/lorax_server/utils/state.py
+++ b/server/lorax_server/utils/state.py
@@ -10,12 +10,12 @@
 
 
 LORAX_PROFILER_DIR = os.environ.get("LORAX_PROFILER_DIR", None)
-PREFIX_CACHING = bool(os.environ.get("PREFIX_CACHING", ""))
-CHUNKED_PREFILL = bool(os.environ.get("CHUNKED_PREFILL", ""))
+PREFIX_CACHING = bool(int(os.environ.get("PREFIX_CACHING", "0")))
+CHUNKED_PREFILL = bool(int(os.environ.get("CHUNKED_PREFILL", "0")))
 LORAX_SPECULATION_MAX_BATCH_SIZE = int(os.environ.get("LORAX_SPECULATION_MAX_BATCH_SIZE", 32))
 
 # Always use flashinfer when prefix caching is enabled
-FLASH_INFER = bool(os.environ.get("FLASH_INFER", "")) or PREFIX_CACHING
+FLASH_INFER = bool(int(os.environ.get("FLASH_INFER", "0"))) or PREFIX_CACHING
 if FLASH_INFER:
     logger.info("Backend = flashinfer")
 else: