diff --git a/lib/node_modules/@stdlib/math/base/special/fibonaccif/README.md b/lib/node_modules/@stdlib/math/base/special/fibonaccif/README.md
index 5614ab9eb5f6..40951a990dff 100644
--- a/lib/node_modules/@stdlib/math/base/special/fibonaccif/README.md
+++ b/lib/node_modules/@stdlib/math/base/special/fibonaccif/README.md
@@ -164,19 +164,19 @@ logEachMap( 'fibonaccif(%d) = %0.1f', x, fibonaccif );
 Computes the nth [Fibonacci number][fibonacci-number] as a single-precision floating-point number.
 
 ```c
-float out = stdlib_base_fibonaccif( 0 );
+float out = stdlib_base_fibonaccif( 0.0f );
 // returns 0.0f
 
-out = stdlib_base_fibonaccif( 1 );
+out = stdlib_base_fibonaccif( 1.0f );
 // returns 1.0f
 ```
 
 The function accepts the following arguments:
 
--   **n**: `[in] int32_t` input value.
+-   **n**: `[in] float` input value.
 
 ```c
-float stdlib_base_fibonaccif( const int32_t n );
+float stdlib_base_fibonaccif( const float n );
 ```
 
 </section>
@@ -200,15 +200,14 @@ float stdlib_base_fibonaccif( const int32_t n );
 ```c
 #include "stdlib/math/base/special/fibonaccif.h"
 #include <stdio.h>
-#include <stdint.h>
 
 int main( void ) {
-    int32_t i;
+    float i;
     float v;
 
-    for ( i = 0; i < 37; i++ ) {
+    for ( i = 0.0f; i < 37.0f; i++ ) {
         v = stdlib_base_fibonaccif( i );
-        printf( "fibonaccif(%d) = %f\n", i, v );
+        printf( "fibonaccif(%f) = %f\n", i, v );
     }
 }
 ```
diff --git a/lib/node_modules/@stdlib/math/base/special/fibonaccif/benchmark/c/native/benchmark.c b/lib/node_modules/@stdlib/math/base/special/fibonaccif/benchmark/c/native/benchmark.c
index a85da61142e4..d22366d44a61 100644
--- a/lib/node_modules/@stdlib/math/base/special/fibonaccif/benchmark/c/native/benchmark.c
+++ b/lib/node_modules/@stdlib/math/base/special/fibonaccif/benchmark/c/native/benchmark.c
@@ -18,7 +18,6 @@
 
 #include "stdlib/math/base/special/fibonaccif.h"
 #include <stdlib.h>
-#include <stdint.h>
 #include <stdio.h>
 #include <math.h>
 #include <time.h>
@@ -92,14 +91,14 @@ static float rand_float( void ) {
 */
 static double benchmark( void ) {
 	double elapsed;
-	int32_t x;
 	double t;
-	double y;
+	float x;
+	float y;
 	int i;
 
 	t = tic();
 	for ( i = 0; i < ITERATIONS; i++ ) {
-		x = (int32_t)floor( 36.0*rand_float() );
+		x = floorf( 36.0f*rand_float() );
 		y = stdlib_base_fibonaccif( x );
 		if ( y < 0 ) {
 			printf( "should return a nonnegative integer\n" );
diff --git a/lib/node_modules/@stdlib/math/base/special/fibonaccif/examples/c/example.c b/lib/node_modules/@stdlib/math/base/special/fibonaccif/examples/c/example.c
index cab99e248bac..55081e1bc096 100644
--- a/lib/node_modules/@stdlib/math/base/special/fibonaccif/examples/c/example.c
+++ b/lib/node_modules/@stdlib/math/base/special/fibonaccif/examples/c/example.c
@@ -18,14 +18,13 @@
 
 #include "stdlib/math/base/special/fibonaccif.h"
 #include <stdio.h>
-#include <stdint.h>
 
 int main( void ) {
-	int32_t i;
+	float i;
 	float v;
 
-	for ( i = 0; i < 37; i++ ) {
+	for ( i = 0.0f; i < 37.0f; i++ ) {
 		v = stdlib_base_fibonaccif( i );
-		printf( "fibonaccif(%d) = %f\n", i, v );
+		printf( "fibonaccif(%f) = %f\n", i, v );
 	}
 }
diff --git a/lib/node_modules/@stdlib/math/base/special/fibonaccif/include/stdlib/math/base/special/fibonaccif.h b/lib/node_modules/@stdlib/math/base/special/fibonaccif/include/stdlib/math/base/special/fibonaccif.h
index 4b1c175fc166..1148127cc55c 100644
--- a/lib/node_modules/@stdlib/math/base/special/fibonaccif/include/stdlib/math/base/special/fibonaccif.h
+++ b/lib/node_modules/@stdlib/math/base/special/fibonaccif/include/stdlib/math/base/special/fibonaccif.h
@@ -19,8 +19,6 @@
 #ifndef STDLIB_MATH_BASE_SPECIAL_FIBONACCIF_H
 #define STDLIB_MATH_BASE_SPECIAL_FIBONACCIF_H
 
-#include <stdint.h>
-
 /*
 * If C++, prevent name mangling so that the compiler emits a binary file having undecorated names, thus mirroring the behavior of a C compiler.
 */
@@ -31,7 +29,7 @@ extern "C" {
 /**
 * Computes the nth Fibonacci number as a single-precision floating-point number.
 */
-float stdlib_base_fibonaccif( const int32_t n );
+float stdlib_base_fibonaccif( const float n );
 
 #ifdef __cplusplus
 }
diff --git a/lib/node_modules/@stdlib/math/base/special/fibonaccif/lib/main.js b/lib/node_modules/@stdlib/math/base/special/fibonaccif/lib/main.js
index 9380dd553aee..ad56fec914d5 100644
--- a/lib/node_modules/@stdlib/math/base/special/fibonaccif/lib/main.js
+++ b/lib/node_modules/@stdlib/math/base/special/fibonaccif/lib/main.js
@@ -21,7 +21,7 @@
 // MODULES //
 
 var isnanf = require( '@stdlib/math/base/assert/is-nanf' );
-var isIntegerf = require( '@stdlib/math/base/assert/is-integerf' );
+var isNonNegativeIntegerf = require( '@stdlib/math/base/assert/is-nonnegative-integerf' );
 var MAX_FIBONACCI = require( '@stdlib/constants/float32/max-safe-nth-fibonacci' );
 var FIBONACCI = require( './fibonacci.json' );
 
@@ -77,8 +77,7 @@ var FIBONACCI = require( './fibonacci.json' );
 function fibonaccif( n ) {
 	if (
 		isnanf( n ) ||
-		isIntegerf( n ) === false ||
-		n < 0 ||
+		!isNonNegativeIntegerf( n ) ||
 		n > MAX_FIBONACCI
 	) {
 		return NaN;
diff --git a/lib/node_modules/@stdlib/math/base/special/fibonaccif/manifest.json b/lib/node_modules/@stdlib/math/base/special/fibonaccif/manifest.json
index 26a079a0b09f..577851365c52 100644
--- a/lib/node_modules/@stdlib/math/base/special/fibonaccif/manifest.json
+++ b/lib/node_modules/@stdlib/math/base/special/fibonaccif/manifest.json
@@ -37,6 +37,7 @@
       "libpath": [],
       "dependencies": [
         "@stdlib/math/base/napi/unary",
+        "@stdlib/math/base/assert/is-nonnegative-integerf",
         "@stdlib/constants/float32/max-safe-nth-fibonacci"
       ]
     },
@@ -51,6 +52,7 @@
       "libraries": [],
       "libpath": [],
       "dependencies": [
+        "@stdlib/math/base/assert/is-nonnegative-integerf",
         "@stdlib/constants/float32/max-safe-nth-fibonacci"
       ]
     },
@@ -65,6 +67,7 @@
       "libraries": [],
       "libpath": [],
       "dependencies": [
+        "@stdlib/math/base/assert/is-nonnegative-integerf",
         "@stdlib/constants/float32/max-safe-nth-fibonacci"
       ]
     }
diff --git a/lib/node_modules/@stdlib/math/base/special/fibonaccif/src/addon.c b/lib/node_modules/@stdlib/math/base/special/fibonaccif/src/addon.c
index 0c93d2701413..f7827f950841 100644
--- a/lib/node_modules/@stdlib/math/base/special/fibonaccif/src/addon.c
+++ b/lib/node_modules/@stdlib/math/base/special/fibonaccif/src/addon.c
@@ -19,4 +19,4 @@
 #include "stdlib/math/base/special/fibonaccif.h"
 #include "stdlib/math/base/napi/unary.h"
 
-STDLIB_MATH_BASE_NAPI_MODULE_I_F( stdlib_base_fibonaccif )
+STDLIB_MATH_BASE_NAPI_MODULE_F_F( stdlib_base_fibonaccif )
diff --git a/lib/node_modules/@stdlib/math/base/special/fibonaccif/src/main.c b/lib/node_modules/@stdlib/math/base/special/fibonaccif/src/main.c
index 44aefe9f3c41..56c920f08a9a 100644
--- a/lib/node_modules/@stdlib/math/base/special/fibonaccif/src/main.c
+++ b/lib/node_modules/@stdlib/math/base/special/fibonaccif/src/main.c
@@ -17,7 +17,10 @@
 */
 
 #include "stdlib/math/base/special/fibonaccif.h"
+#include "stdlib/math/base/assert/is_nonnegative_integerf.h"
 #include "stdlib/constants/float32/max_safe_nth_fibonacci.h"
+#include <stdint.h>
+#include <stdlib.h>
 
 static const int32_t fibonacci_value[ 37 ] = {
 	0,
@@ -66,12 +69,12 @@ static const int32_t fibonacci_value[ 37 ] = {
 * @return     output value
 *
 * @example
-* float out = stdlib_base_fibonaccif( 1 );
+* float out = stdlib_base_fibonaccif( 1.0f );
 * // returns 1.0f
 */
-float stdlib_base_fibonaccif( const int32_t n ) {
-	if ( n < 0 || n > STDLIB_CONSTANT_FLOAT32_MAX_SAFE_NTH_FIBONACCI ) {
-		return 0.0 / 0.0; // NaN
+float stdlib_base_fibonaccif( const float n ) {
+	if ( !stdlib_base_is_nonnegative_integerf( n ) || n > STDLIB_CONSTANT_FLOAT32_MAX_SAFE_NTH_FIBONACCI ) {
+		return 0.0f / 0.0f; // NaN
 	}
-	return fibonacci_value[ n ];
+	return fibonacci_value[ (size_t)n ];
 }