diff --git a/taskvine/src/manager/vine_manager.c b/taskvine/src/manager/vine_manager.c
index 190e6c9639..946d1132f7 100644
--- a/taskvine/src/manager/vine_manager.c
+++ b/taskvine/src/manager/vine_manager.c
@@ -1461,10 +1461,9 @@ static vine_msg_code_t handle_taskvine(struct vine_manager *q, struct vine_worke
 {
 	char items[4][VINE_LINE_MAX];
 	int worker_protocol;
-	int worker_library_protocol;
 
-	int n = sscanf(line, "taskvine %d %d %s %s %s %s", &worker_protocol, &worker_library_protocol, items[0], items[1], items[2], items[3]);
-	if (n != 6)
+	int n = sscanf(line, "taskvine %d %s %s %s %s", &worker_protocol, items[0], items[1], items[2], items[3]);
+	if (n != 5)
 		return VINE_MSG_FAILURE;
 
 	if (worker_protocol != VINE_PROTOCOL_VERSION) {
@@ -1473,8 +1472,6 @@ static vine_msg_code_t handle_taskvine(struct vine_manager *q, struct vine_worke
 		return VINE_MSG_FAILURE;
 	}
 
-	w->library_protocol_version = worker_library_protocol;
-
 	if (w->hostname)
 		free(w->hostname);
 	if (w->os)
diff --git a/taskvine/src/manager/vine_protocol.h b/taskvine/src/manager/vine_protocol.h
index d32c495d1f..0fe03196cf 100644
--- a/taskvine/src/manager/vine_protocol.h
+++ b/taskvine/src/manager/vine_protocol.h
@@ -15,8 +15,6 @@ worker, and catalog, but should not be visible to the public user API.
 
 #define VINE_PROTOCOL_VERSION 12
 
-#define VINE_LIBRARY_PROTOCOL_VERSION 1
-
 #define VINE_LINE_MAX 4096       /**< Maximum length of a vine message line. */
 
 #endif
diff --git a/taskvine/src/manager/vine_schedule.c b/taskvine/src/manager/vine_schedule.c
index c860f27798..1127e1e636 100644
--- a/taskvine/src/manager/vine_schedule.c
+++ b/taskvine/src/manager/vine_schedule.c
@@ -10,7 +10,6 @@ See the file COPYING for details.
 #include "vine_file.h"
 #include "vine_file_replica.h"
 #include "vine_mount.h"
-#include "vine_protocol.h"
 
 #include "debug.h"
 #include "hash_table.h"
@@ -204,12 +203,6 @@ int check_worker_against_task(struct vine_manager *q, struct vine_worker_info *w
 		return 0;
 	}
 
-	/* Check if the library and the worker have the same library protocol version. */
-	if (t->provides_library && (w->library_protocol_version != VINE_LIBRARY_PROTOCOL_VERSION)) {
-		debug(D_VINE, "Worker %s can't run library with id %d due to mismatched library protocol version.", w->workerid, t->task_id);
-		return 0;
-	}
-
 	/* Compute the resources to allocate to this task. */
 	struct rmsummary *l = vine_manager_choose_resources_for_task(q, w, t);
 
diff --git a/taskvine/src/manager/vine_worker_info.h b/taskvine/src/manager/vine_worker_info.h
index d5c9dc7c7d..c52fa91103 100644
--- a/taskvine/src/manager/vine_worker_info.h
+++ b/taskvine/src/manager/vine_worker_info.h
@@ -28,9 +28,6 @@ struct vine_worker_info {
 	/* Connection to the worker or other client. */
 	struct link *link;
 
-        /* Library protocol version of this worker. */
-        int library_protocol_version;
-
 	/* Static properties reported by worker when it connects. */
 	char *hostname;
 	char *os;
diff --git a/taskvine/src/worker/vine_worker.c b/taskvine/src/worker/vine_worker.c
index 191d55feeb..273b5cd4b6 100644
--- a/taskvine/src/worker/vine_worker.c
+++ b/taskvine/src/worker/vine_worker.c
@@ -564,9 +564,8 @@ static void report_worker_ready(struct link *manager)
 	}
 
 	send_async_message(manager,
-			"taskvine %d %d %s %s %s %d.%d.%d\n",
+			"taskvine %d %s %s %s %d.%d.%d\n",
 			VINE_PROTOCOL_VERSION,
-			VINE_LIBRARY_PROTOCOL_VERSION,
 			hostname,
 			options->os_name,
 			options->arch_name,