diff --git a/configure.ac b/configure.ac
index 33e87c3..492098e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -14,7 +14,7 @@ dnl  WITHOUT ANY WARRANTY; without even the implied warranty of
 dnl  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 dnl  General Public License for more details.
 
-AC_INIT([falco], [1.3.1], [andrewds@usc.edu],
+AC_INIT([falco], [1.3.2], [andrewds@usc.edu],
         [falco], [https://github.com/smithlabcode/falco])
 dnl the config.h is not currently #included in the source, and only
 dnl used to keep command lines short.
diff --git a/src/StreamReader.cpp b/src/StreamReader.cpp
index 40b5ffc..0db8337 100644
--- a/src/StreamReader.cpp
+++ b/src/StreamReader.cpp
@@ -692,27 +692,37 @@ FastqReader::~FastqReader() {
 // Parses fastq gz by reading line by line into the gzbuf
 bool
 FastqReader::read_entry(FastqStats &stats, std::size_t &num_bytes_read) {
-  cur_char = fgets(filebuf, RESERVE_SIZE, fileobj);
-
-  // need to check here if we did not hit eof
+  cur_char = std::fgets(filebuf, RESERVE_SIZE, fileobj);
   if (is_eof())
     return false;
+  if (cur_char == nullptr)
+    throw std::runtime_error("encountered invalid read number: " +
+                             std::to_string(stats.num_reads + 1));
 
   do_read = (stats.num_reads == next_read);
 
   read_tile_line(stats);
   skip_separator();
 
-  cur_char = fgets(filebuf, RESERVE_SIZE, fileobj);
+  cur_char = std::fgets(filebuf, RESERVE_SIZE, fileobj);
+  if (cur_char == nullptr)
+    throw std::runtime_error("encountered invalid read number: " +
+                             std::to_string(stats.num_reads + 1));
   read_sequence_line(stats);
 
   skip_separator();
 
-  cur_char = fgets(filebuf, RESERVE_SIZE, fileobj);
+  cur_char = std::fgets(filebuf, RESERVE_SIZE, fileobj);
+  if (cur_char == nullptr)
+    throw std::runtime_error("encountered invalid read number: " +
+                             std::to_string(stats.num_reads + 1));
   read_fast_forward_line();
   skip_separator();
 
-  cur_char = fgets(filebuf, RESERVE_SIZE, fileobj);
+  cur_char = std::fgets(filebuf, RESERVE_SIZE, fileobj);
+  if (cur_char == nullptr)
+    throw std::runtime_error("encountered invalid read number: " +
+                             std::to_string(stats.num_reads + 1));
   read_quality_line(stats);
   skip_separator();
 
diff --git a/test/md5sum.txt b/test/md5sum.txt
index 625e0f3..6adb073 100644
--- a/test/md5sum.txt
+++ b/test/md5sum.txt
@@ -1,30 +1,30 @@
-6fb32514f5a67b6ac349be0747272495  test_output/SRR10143153_1/fastqc_data.txt
-9ad191925d47a57d4f8b12f21ba0a7c3  test_output/SRR10143153_1/summary.txt
-62ab46b4ce95b0cd76ecb9e72f7d7e3b  test_output/SRR9624732_1/fastqc_data.txt
-c94f94bdfbed9b83f156c15ffea84127  test_output/SRR9624732_1/summary.txt
-8c080d1466e0b36b33067037f9edd2eb  test_output/SRR3897196_2/fastqc_data.txt
-80cd130958bcb2219f1e5a07d06a3b6e  test_output/SRR3897196_2/summary.txt
-16a1ba47dc2252f17ed3b763e6fd921d  test_output/SRR10124060/fastqc_data.txt
+16e2812d1fb1503288517ad204d1d5f4  test_output/SRR10124060/fastqc_data.txt
 776f7d1b53bbed8683de9ca1d2529f1e  test_output/SRR10124060/summary.txt
-36c5ebf0b8f55a68e8eb9c73a16db8cf  test_output/SRR3897196_1/fastqc_data.txt
-b736ee95d5c450ef5c0dda31957b6818  test_output/SRR3897196_1/summary.txt
-89bd71cceabbe7ba0b2da473eebf2890  test_output/SRR6387347/fastqc_data.txt
-a61f65047e76f93300967cf399d044de  test_output/SRR6387347/summary.txt
-4c5c242c82f151f330ccc8d2b34b9d17  test_output/SRR1772703.lite.1/fastqc_data.txt
+d89e0e207fc4d1db79ea982281a920cd  test_output/SRR10143153_1/fastqc_data.txt
+9ad191925d47a57d4f8b12f21ba0a7c3  test_output/SRR10143153_1/summary.txt
+6111e939668687d1b48b0faf3996f4af  test_output/SRR10143153_2/fastqc_data.txt
+19f1811f324e4c44154f659bb6e22806  test_output/SRR10143153_2/summary.txt
+6869c2d401fc68790f03e0f44e70ab2c  test_output/SRR1772703.lite.1/fastqc_data.txt
 ad5727295e7c8de6eb6874837bf1518f  test_output/SRR1772703.lite.1/summary.txt
-be1c33db6d105fab4f1d35142b7d3b66  test_output/SRR9878537.lite.1/fastqc_data.txt
-e5c40997d4993c07e164ee5598c39cf9  test_output/SRR9878537.lite.1/summary.txt
-0f0cb18c3d6b15301b00731a3d8694e9  test_output/SRR9624732_2/fastqc_data.txt
-fefc5d746f853c14b5e00421ad1ec260  test_output/SRR9624732_2/summary.txt
-b65e60aacf2c5aff868b725c77ee181d  test_output/SRR1853178_2/fastqc_data.txt
-c331d0f7a6aa9d72be41ac531f9ba269  test_output/SRR1853178_2/summary.txt
-d86c1775f9bfff98343ceb93a712e63a  test_output/SRR1853178_1/fastqc_data.txt
+8de8438185e7a4682b4f9def9efbd5b7  test_output/SRR1853178_1/fastqc_data.txt
 36df1dcab539ba4ef885239fc8524636  test_output/SRR1853178_1/summary.txt
-198d1f368f19dd5b70bd8d63e083ee89  test_output/SRR10143153_2/fastqc_data.txt
-19f1811f324e4c44154f659bb6e22806  test_output/SRR10143153_2/summary.txt
-ee682b255b1d4824164b6a02878712dd  test_output/SRR891268_2/fastqc_data.txt
-20a8e50baace4c672622793874a3d7de  test_output/SRR891268_2/summary.txt
-44fdb71976ac47bd31c230fad841aa9e  test_output/SRR891268_1/fastqc_data.txt
-69e7d0c53cd2e67117637c408b65333a  test_output/SRR891268_1/summary.txt
-786295bff1d6169e3ef10dc4970c3a30  test_output/SRR6059706.lite.1/fastqc_data.txt
+fc0bfa1e0143ed06dda6999fbf5588aa  test_output/SRR1853178_2/fastqc_data.txt
+c331d0f7a6aa9d72be41ac531f9ba269  test_output/SRR1853178_2/summary.txt
+8dc07f2b597a8866a9df84e3ebde0f38  test_output/SRR3897196_1/fastqc_data.txt
+b736ee95d5c450ef5c0dda31957b6818  test_output/SRR3897196_1/summary.txt
+21f6b1a9745e4f6fd9f74a3583fb93d7  test_output/SRR3897196_2/fastqc_data.txt
+80cd130958bcb2219f1e5a07d06a3b6e  test_output/SRR3897196_2/summary.txt
+14b2a16b2ded1851605a9c5aaf30153a  test_output/SRR6059706.lite.1/fastqc_data.txt
 e348e4bcc7fc6f05e989ac7858d2b287  test_output/SRR6059706.lite.1/summary.txt
+5ffb8fadcd44cb08886e540871ad3267  test_output/SRR6387347/fastqc_data.txt
+a61f65047e76f93300967cf399d044de  test_output/SRR6387347/summary.txt
+6a2d88378dbc961172fbf6dcc7a00339  test_output/SRR891268_1/fastqc_data.txt
+69e7d0c53cd2e67117637c408b65333a  test_output/SRR891268_1/summary.txt
+485b013200cc99259d94aac50da9e48c  test_output/SRR891268_2/fastqc_data.txt
+20a8e50baace4c672622793874a3d7de  test_output/SRR891268_2/summary.txt
+35d6d130ca4423eb9b69b5f28129754d  test_output/SRR9624732_1/fastqc_data.txt
+c94f94bdfbed9b83f156c15ffea84127  test_output/SRR9624732_1/summary.txt
+d3795756759b32243b7108ca84d3b5b5  test_output/SRR9624732_2/fastqc_data.txt
+fefc5d746f853c14b5e00421ad1ec260  test_output/SRR9624732_2/summary.txt
+4a12fd588b54713b5eed0d3ae334a99e  test_output/SRR9878537.lite.1/fastqc_data.txt
+e5c40997d4993c07e164ee5598c39cf9  test_output/SRR9878537.lite.1/summary.txt