diff --git a/scripts/profile-memory.py b/scripts/profile-memory.py
index 349f6ee9..c6e2df90 100644
--- a/scripts/profile-memory.py
+++ b/scripts/profile-memory.py
@@ -16,10 +16,10 @@ def display_top(snapshot, key_type="lineno", limit=10):
     )
     top_stats = snapshot.statistics(key_type)
 
-    print("Top %s lines" % limit)
+    print(f"Top {limit} lines")
     for index, stat in enumerate(top_stats[:limit], 1):
         frame = stat.traceback[0]
-        print("#%s: %s:%s: %.1f KiB" % (index, frame.filename, frame.lineno, stat.size / 1024))
+        print(f"#{index}: {frame.filename}:{frame.lineno}: {stat.size / 1024:.1f} KiB")
         line = linecache.getline(frame.filename, frame.lineno).strip()
         if line:
             print("    %s" % line)
@@ -27,9 +27,9 @@ def display_top(snapshot, key_type="lineno", limit=10):
     other = top_stats[limit:]
     if other:
         size = sum(stat.size for stat in other)
-        print("%s other: %.1f KiB" % (len(other), size / 1024))
+        print(f"{len(other)} other: {size / 1024:.1f} KiB")
     total = sum(stat.size for stat in top_stats)
-    print("Total allocated size: %.1f KiB" % (total / 1024))
+    print(f"Total allocated size: {total / 1024:.1f} KiB")
 
 
 def main():
@@ -45,11 +45,11 @@ def main():
     import capa.main
 
     count = int(os.environ.get("CAPA_PROFILE_COUNT", 1))
-    print("total iterations planned: %d (set via env var CAPA_PROFILE_COUNT)." % (count))
+    print(f"total iterations planned: {count} (set via env var CAPA_PROFILE_COUNT).")
     print()
 
     for i in range(count):
-        print("iteration %d/%d..." % (i + 1, count))
+        print(f"iteration {i + 1}/{count}...")
         with contextlib.redirect_stdout(io.StringIO()):
             with contextlib.redirect_stderr(io.StringIO()):
                 t0 = time.time()
@@ -59,9 +59,9 @@ def main():
                 gc.collect()
 
         process = psutil.Process(os.getpid())
-        print("  duration: %0.02fs" % (t1 - t0))
-        print("  rss: %.1f MiB" % (process.memory_info().rss / 1024 / 1024))
-        print("  vms: %.1f MiB" % (process.memory_info().vms / 1024 / 1024))
+        print(f"  duration: {t1 - t0:.02f}s")
+        print(f"  rss: {process.memory_info().rss / 1024 / 1024:.1f} MiB")
+        print(f"  vms: {process.memory_info().vms / 1024 / 1024:.1f} MiB")
 
     print("done.")
     gc.collect()