diff --git a/libcdf/Makefile b/libcdf/Makefile
index 1d94461..827ad48 100644
--- a/libcdf/Makefile
+++ b/libcdf/Makefile
@@ -2,11 +2,11 @@
 # install CDF library from sources
 #
 
-VERSION = 39_0
+VERSION = 39_1
 DIRNAME = ./cdf$(VERSION)-dist/
 FILENAME = ./cdf$(VERSION)-dist-cdf.tar.gz
 SOURCE_URL = https://spdf.gsfc.nasa.gov/pub/software/cdf/dist/cdf$(VERSION)/linux/cdf$(VERSION)-dist-cdf.tar.gz
-MD5CHECKSUM = 7c6489017be3aee20d6d99f562f952f6
+MD5CHECKSUM = 484cfdba8c93dbb1f7ad42b0b0df679b
 INSTALLDIR ?= /usr/local/cdf
 
 all: build
@@ -15,19 +15,19 @@ clean:
 	-rm -fR $(DIRNAME)
 
 install: build test
-	-make -C $(DIRNAME) INSTALLDIR=$(INSTALLDIR) install
+	make -C $(DIRNAME) INSTALLDIR=$(INSTALLDIR) install
 
 test: build
-	-make -C $(DIRNAME) test
+	make -C $(DIRNAME) test
 
 build: $(DIRNAME)
-	-make -C $(DIRNAME) OS=linux ENV=gnu CURSES=no all
+	make -C $(DIRNAME) OS=linux ENV=gnu CURSES=no all
 
 $(DIRNAME): $(FILENAME) md5check
-	-tar -xzf $(FILENAME)
+	tar -xzf $(FILENAME)
 
 md5check: $(FILENAME)
-	-echo $(MD5CHECKSUM) $(FILENAME) | md5sum -c
+	echo $(MD5CHECKSUM) $(FILENAME) | md5sum -c
 
 $(FILENAME):
-	-curl $(SOURCE_URL) > $(FILENAME)
+	curl $(SOURCE_URL) > $(FILENAME)
diff --git a/libcdf/meta.yaml b/libcdf/meta.yaml
index 83fc6a1..1db68cd 100644
--- a/libcdf/meta.yaml
+++ b/libcdf/meta.yaml
@@ -8,8 +8,8 @@
 #       are compiled with different versions of the GFortran compiler.
 
 
-{% set version = "3.9.0" %}
-{% set file_version = "cdf39_0" %}
+{% set version = "3.9.1" %}
+{% set file_version = "cdf39_1" %}
 
 package:
   name: "cdf"
@@ -17,7 +17,7 @@ package:
 
 source:
   - url: https://spdf.gsfc.nasa.gov/pub/software/cdf/dist/{{ file_version }}/unix/{{ file_version }}-dist-cdf.tar.gz
-    sha256: ae1916d73af43141dc09f14864166395c23245527e79ae92b25314ee0e27a9b7
+    sha256: 01d860cdfd8a466b232738facd169e87e1d70aa5dabb762e864b81f5ccf66622
 
 requirements:
   build: